I actually don't agree with the pp that says it is only your choice. This is the moment your DP becomes a father. Its a big moment for him too.
So i think it depends. Can your DP be depended on to give you the support you need... be suitably sympathetic, encouraging, not complain that he's bored/tired/hungry? Will he be able to be your advocate when you can no longer speak through the pain and important decisions can be made.
You also need to think about how your mum and DP interact, would one feel left out, would one dominate?
I have only had my DH at both my births. My mum was standby at first because DH was in Saudi for the last 10 weeks and made it home with only 24 hours to spare.
Second time I invited mum, because she has always thought childbirth is the most incredible thing and my dad had died just 10 days before. But she declined, knowing that we really needed her on standby for DD and that it should really be just us.
This time is definitely my last and I think I'd rather it were just the 2 of us, but I do have some guilt about depriving my mum of the opportunity. That being said, i think COVID will keep that simple for me.
The only comparison I can give you is when I had all 4 wisdom teeth out under GA. I was living in the Middle East at the time and cos DH (though we weren't married at the time and still quite young) worked away often and at short notice, my mum came out as I couldn't gave the surgery without someone to take me home (plus an excuse for time in the sun). Anyway DH ended up being home so they were both there when I came round. I don't remember much but I know my mum (who is excellent at looking after people) felt completely useless because my DH wouldn't leave my side.
I think the same situation would have happened in labour because the one constant I can remember when things were beyond painful was DH by my side holding my hand. I don't think mum would have known what to do with herself.