Your ISP might detect the inbound traffic and shut you down. Most residential ISPs have a "no servers allowed" clause.

Better to tunnel traffic back to you, either through a 3rd party service (Cloudflare tunnels, like someone else mentions) or through a VPS that you control. That way, your home IP address is not directly exposed.

There is still some security concerns having a server directly on your home network. For example, if it was compromised it could access other systems on your LAN. With a more sophisticated router, you could mitigate that (isolate by putting it on its own network, block most outgoing traffic, etc.) The typical home router won't have the features for that.