I don't remember my parents ever helping me with homework and I gave very limited help to our children, mostly at the primary stage.
However we now have four teenage grandchildren, all living some distance away and thanks to technology I have weekly sessions with each of them, which started during the first lockdown.
I am not a trained teacher but have always liked maths so we generally do some maths together and have a chat. I try not to "do their homework" but may give them hints. Sometimes we look at maths you tube videos.
As well as their coursework we also do problems from "the Ultimate Maths Challenge " a brilliant anthology of problems from the UK Mathematics Trust.
When we do problems together I sometimes make mistakes, not a bad thing as they know we can all make mistakes and there is a difference between silly careless mistakes and not understanding. Fortunately they seem to enjoy it.
Occasionally I wake up in the middle of the night going over a maths problem and I think this may happen more often now that the oldest is doing A Level. I think we all benefit from it. Our relationship is closer than it could otherwise have been since we are seldom able to visit each other and I hope attempting to get my head round things I did a very long time ago, but long since forgot, must be good for my brain.