Made a server and friends cant connect HELP!

hello, i recently made a server to play with a couple friends did all the right steps necessary but they get connection failed error code 10060. i tried port forwarding and seem to have it set up right on my eero router app but it says its not open on portchecktool i really am frustrated with this since ive been trying to figure it out for a week but have had zero luck or help only thing i can think that may be the issue is i recently got a new router from verizon but the company set it up to work as a modem and you cant connect to it so maybe i need to port forward in that also?? any help is appreciated really dont want to have people buying a game you cant play together on and waste money