Is there a way to limit the number of rings on an Iphone 7?

Incoming calls will ring 7 or 8 times before going to voicemail. Is there a way to have it only ring like 4 times and then go to voicemail?

Yes

How do you make your iPhone ring only 4 times then go to voice mail? Rather than it ringing 7-8 times.

Nope & its usually 6 rings or 30 seconds.