Just copy Google Classroom as it has all the features that Teams lacks.
Enable pupils to resubmit their work AFTER it has been marked so they can improve it, I can not find a way of doing this. Be able to write and assignment and then issue it to different classes. Be able to extract all of a classes marks and export it into a spreadsheet. Be able to send a class e-mail out. Make it easier to add team members as I have to copy full e-mail address in as it doesn't recognise part names. There are other deficiencies but these are the biggest so far.