can't find FPP after a router change

[mrgimmeone]

I recently changed internet providers and have a pi on an address of xxx.xxx.1.x. the new providers use an address of xxx.xxx.4.x. the router is an Eero pro 6 an as far as i can tell i can't add a second network to this router so i can regain access to this pi so i can change to the new address type. Is there a way to do this without completely redoing the fpp on this pi an lose the show on it?

[MikeKrebs]

Connect the RPi to your PC.
Go to the network settings and change your IP to x.x.1.x that is different from the RPi. Then browse to the RPi and change its IP to x.x.4.x. Reboot the RPi. Change your PC back to what it was (probably DHCP) and plug both back into the switch.

[K-State Fan]

I have not worked with a Eero router but can you not just set the IP on it so it is the same as the old one?

[mrgimmeone]

not that i can find. this is one of those mesh routers and i have looks everywhere in the settings to find a way to do that but have found nothing.