Mail App Issue: Not showing preview, won’t load app. But does show unread email notifications

Very recently my mail app isn’t working correctly. I have unread emails that the app shows me a notification for, but when I click on the app it shows boxes as if emails were there, but no text preview, and won’t let me click into them.

I’m currently running iOS 26.1 (23B85) - all apps up to date. Have removed and readded etc.

Any help appreciated, it’s across all mailboxes too, yahoo, hotmail, personal email, iCloud, all of them!