They might slip on their deadlines during a global crisis, or they might just work more than they usually do (childcare and regular work). Childless people will likely naturally move ahead in their careers.

It depends a lot on the nature of your work.

I have a young child and, over the last 4 months, have probably spent less time than ever doing work for my employer.

At the same time, just by having the right idea/insight at the appropriate time, I've probably delivered more value to my employer in the last 2 months than ever before.

I think and hope that the outcome of all this in terms of my career will be a net positive. But I guess time will tell.

Unless a social justice movement prevents it on equity/diversity/inclusion grounds, as has been mooted at my company.