Bitcoin Knots Connections

I’ve installed Bitcoin Knots on my Umbrel over the weekend and I was wondering about the connection counts.

When I ran Core I could see that allowing incoming connections worked in that the total connections usually stayed above 15/20, but in Knots even though I’ve enabled incoming connections in the advanced settings, the connections are always only 10.

I never had to set up port forwarding in Core, so I’m wondering do I have to with Knots, or will this not make any difference?

Any ideas from anyone?