Allow to use or at least find published to Marketplace SPFx solutions on SP2019
Currently it's not possible to find published to Marketplace SPFx solution on SP2019.
It would be good to have possibility to achieve SP2019 users with SPFx solutions that currently published to Marketplace. Such solutions could have description or even links to packages that could be used for SP2019.
Or if it possible - publish process to Marketplace could be extended with additional package that could be used for SP2019
Another idea is to extend SPFx schema additional property - Url to SP2019 package (or to custom page where additional description could be posted for SP2019 users that want to install SPFx from Marketplace)