Does one needs to enable port-forwarding to run a bitcoin node and a electrum server?

I plan to setup a raspiblitz, an electrum server and a bitcoin node (I think I can run all these and event lightning in raspiblitz if I'm not wrong.) for testing purposes and learn more about the BTC ecosystem, at least for now.

I want to know if I need to do port-forwarding on my ISP's router. I believe this depends on if I want to allow incoming connections (f.e. allow other to use my node or my electrum server) right?

Thank you!