Not enough space between front mounted child bike seat and rider
I found something called a "mother steering" ("moederstuur" in Dutch). We replaced the steering bar of our bike with this, and viola, ~20cms of extra space between me and the mounting point of the bike seat!





Disclaimer: the steering we bought is heavier than the original steering, it took a couple of days to get used to it

There seem to be a few different such products, serving a similar function, at least available in the Netherlands.