The screenshot is very helpful for me to understand what's going on. It shows your Orbi network which I understand is the usual one you use to communicate, and another network created by the Time Capsule which won't be able to connect to the Internet. If I have that correct so far, and if all you want to do is browse the backups on that Time Capsule, then the "Browse Other Backup Disks..." option should work to restore individual items. This assumes you did not deliberately erase the Time Capsule (if you did that, it would have warned you about what was about to happen).
If you want to continue to use that Time Capsule to back up your Mac, then you would need to reconfigure the TC to act as a client on your Orbi network. The only way to do that is to connect its Ethernet "circle of dots" port directly to whatever Ethernet ports the Orbi network equipment may offer... and I'm not familiar with their equipment. Then, one would "hard reset" the TC, "connect" to it, reconfigure it to join the Orbi network as a client, and finally tell Time Machine to start using it. The good news is that all its existing backups would remain unaffected by that reconfiguration.
All I use for all my networks are Apple Time Capsules and AirPort Extreme / Express units, which limits my ability to assist with other manufacturers in anything more than a cursory manner. Apple made everything simple.