Glad you're feeling reassured OP.
It's such a tricky time right now, you are right go with it a bit more and give it time. I used to struggle to know what to do to help DS with speech and expression. Could you ask your mum to help you put together a rough timetable for the day that you and dad follow. Kids love a routine / similar flow to the day. Something like
Wake up, cuddles, breakfast, time with you before you start working.
Get ready.. make this into a game, where are the socks, let's find your teacher top type thing.
Activity..
Snack
Activity
Lunch
Nap
Activity
Snack
Activity
Tea
Eve routine
Activities could be a park trip, playing with toys.. theming toys can be good so your not playing with everything at once, singing.. especially those rhymes with actions, watching a baby group or online baby class.. the baby club is good for seeing children, treasure hunt.. can you find X, colour matching games, linking in with your mum on zoom ask her to do some of those games!
Anything really. Obviously you find need to become entertainers but thinking of Mon to Fri being like childcare may help you all feel happier.
There are some great bloggers around or look on Pinterest for 2 year old play ideas. You can't replace the social contact and this will be affecting all children in your situation, he'll soon develop these skills when his contact increases. You may not want to compare him to age as he'll be behind, think of it as how the stages develop of communication then you'll feel happier with his progress.
Sorry I waffled on a bit!