You can find this with the Brother App or Network scanner app, router app.
nmap -p 9100,631,515,443 192.168.0.0/24
Nmap scan report for 192.168.0.12
Host is up (0.031s latency).
PORT STATE SERVICE
443/tcp closed https
515/tcp open printer
631/tcp open ipp
9100/tcp open jetdirect
To make sure this is a long term solution. Go to your router settings to use Reserved IP (static local IP) with your printer so DHCP doesn’t change its IP address.