Bug I can join my minecraft skyfactory 4 server but my friends cant! (connection timed out)

[iKJ]

Hello I have been trying to get my friends on my server for 2 days but it isnt working i think its port forwarding issue but ive tried everything and it still doesnt work
i have:
-downloaded newest java update
-launched the server correctly
-setup port forwarding (not sure if correctly)
-disabbled windows firewall and router firewall
still nothing works please help!