SD card readers problems

I used to use an SD Apple Card reader on both an iPad and also various iPhones. I just plugged in the sd loaded reader and the iPad/iPhone would automatically give me a couple of easy options. I haven’t managed Tod this for a while even with my new iPhone 12 and iPad Pro. Ive tried a couple of ideas on choline’s but no luck. I’ve also tried on another new iPad Pro. Still no joy. I think it all changed when around iOS14 . I’m completely up to date now with iOS 15:02:01 . Still no joy.

it’s very frustrating as I now have to put the sd card into a full on computer to make it work. It was one of the reasons I kept with iPads as it was so simple for uploading and editing.

does any one have any ideas?