While not a direct answer to your questions, the EBF Files app does support what you are looking for in some fashion. They do support AppConfig for device configuration. Best of luck!

I have this exact same question.

Hello. Any further info on this? Our agency has been using FileExplorer for a number of years, but now that Files natively supports SMB shares, it would be nice to get away from third party software. I too am very interested in whether or not Jamf Pro can send out a pre-configured SMB share setting to multiple users' iOS and iPadOS devices.

This is not a perfect solution, but you can create a web clip. Ex:  smb://fileserver.yourdomain.com/path

It will open in files.app.