Hello,
I made this shortcut that look for reminders with an agenda URL in the note field (in the reminder app), copy it in the URL field and clear the note field.
If you have a lot of reminders make sure you understand exactly what this shortcut is doing and adjust it if needed so you don’t mess up your organisation by running it.
It’s very but I believe it can help some people as I have seen some topics mentioning this issue and the developers said somewhere that there is some restriction from apple preventing them to put the link directly in the URL field.
https://www.icloud.com/shortcuts/125e0aa117044770bcf75d39ed6dd90b
Cheers
, see