Which part of the country are you in?
Last year paid havoc with our training. We where due to go into open water at Easter, then the lockdown occurred.
We managed to get those that weren't sheltering through the open water part of OD during August / September. Granted, they worked very hard. We had no pool facilities (our pool remained closed), so they had to refresher skills in open water, and work through the lessons.
We have a few who where and are still 'sheltering', and will resume when they are ready.
Those that did finish last year have done a number of club trips this year. Plymouth, Cornwall, and the Farnes.
We are lucky in that we have a lot of instructors, so we can spread the load.
As others have suggested, you could use a school to finish off those elements you need.
If you are proactive, you might be able to talk one of the instructors into completing the last of your lessons on a specified timetable.
Or you could change branches.