It is mentioned in the blogs that the SharePoint app supports managed app configuration for using with an MDM to pre-configure the app, before distributing to users.
This sounds great - where can I read more on this? Is there a documentation for the configuration to set?

The ability to view/preview .msg files in the SharePoint iOS app

Sharepoint Calendar categories.
If you amend existing / create your own, they do not not show up on the mobile Sharepoint app. If you have calendar overlays on your SP site the events entered on mobile app with "old standard style" category do not show!! Why must the mobile view default to the standard calendar categories???

When a Modern page aspx file is created as landing page for a Classic Experience site, it should show up first when the site is opened in the SharePoint Applicaton for iOS. This is already working for Android phones, I don't understand why this is not working for iOS devices.

In additions to the current Sharepoint app notification rules https://support.office.com/en-ie/article/When-the-SharePoint-mobile-app-will-notify-you-2113fb91-c660-4034-8d5b-6285f47d127e , add the following.

Push notification from News sites marked as organizational authoritative news site. ( Set-SPOOrgNewsSite )

Hide additional links like files, lists, news, activities from quick launch in modern team sites in SharePoint mobile app. I don't want my users to view master lists and any config lists. This should be an option at least. This is coming up only in mobile app and not in browser.

Native access to Lists, with synchronization and offline capabilities, not just a Safari embedded browser like now

If you use a list for something like IT issues, you should be able to add an item to that list, a client should be able to add their broken computer issue to the list for the admin to fix. And the admin able to keep the client up to date with the fix without having to go to a desktop version to update the issue.

The logo on the desktop is not constrained to a square, but the mobile app does. I have a wide banner-type logo so it shows up tiny in a colored box. Please free the aspect ratio so the logo is directly on the page in its correct aspect ratio.

I am unable to have users edit and post items when working through ”Mobile Browser View" even if they have the right to "Post".
Although I make ”Mobile Browser View” invalidated within SharePoint site, once I open the item lists in the mobile SharePoint app, I still find them shown on "Mobile Browser View”.　I think this is odd and I doubt that I will be able to see exactly the same behavior on mobile SharePoint app after attempting to make mobile browser view invalidated in SharePoint site. So far, I have seen no linkage in terms of operating environment.

When using the mobile app Calendar overlays that appear on a desktop do not show in the app - they should

In our portal we assigned common properties (tags) to each of the files uploaded to SharePoint document library. We have grouped them.
Is it possible to show the different views. For example: Allows for filtering, grouping, sorting of documents based on their properties.

*English follows Japanese

[閲覧のみ] 権限のユーザーより、iOS 版の SharePoint アプリから Office ファイルを開こうとすると、エラーが発生し、開くことができない事象について

[閲覧のみ] 権限のユーザーより、iOS 版の SharePoint アプリから Office ファイルを開こうとすると、エラーが発生し、開くことができない状況となります。iOS 版の SharePoint アプリから該当サイトへアクセスし、三本線をタップし、[サイト コンテンツ] または [ホーム] をタップしてから操作することで、[閲覧のみ] 権限のユーザーも Office ファイルを閲覧することが可能となりますが、他の操作方法では開けないので、すべての操作で正常に閲覧できるようにしたい。

When a view only user try to open an office file from the SharePoint app for IOS, an error occurred and the file cannot be opened.
They can view the office file by accessing the sites from the SharePoint app for IOS, taping triple, site contents or home.
The view only user only can use this way to open the file, please make them can view the file using normal operation

When accessing files in the SharePoint mobile app, it opens OneDrive and displays the file. However, when you try to access a photo library in SharePoint, it opens OneSrive and nothing happens. It seems like photo libraries aren't supported in OneDrive.

Dark mode

Is it possible to add or delete items on a calendar?