Nostr Connect is another term for NIP-46 remote signing. You might see "Connect with Nostr" buttons on apps, and this usually means NIP-46. The app wants to connect to your signer.
The flow is to scan a QR code or paste a bunker URL, approve the connection, and the app now uses your signer for signatures. Different implementations have quirks, with some using nostr+walletconnect:// URIs and some using bunker://. The underlying protocol is the same.
If something calls itself "Nostr Connect," it's probably NIP-46 compatible. Check the docs if you're unsure. With Signet, you should be able to connect.
Signet
signet@primal.net
npub1xmrc...wsfv
Self-hosted NIP-46 remote signer
Android app has been updated to version 1.1.1

Zapstore
Signet — Zapstore
Keep your Nostr private keys secure on a server you control. When apps need to sign events, Signet handles the request. Features: Real-time push no...
📦 Signet commit
Added QR code to daemon for non-Docker instances which can be scanned via the Android app to set up a new server. Additionally, fixed several compilation issues that could cause issues when running signet-ui via pnpm.
7a0cf23

GitHub
Added QR code to daemon for non-Docker instances which can be scanned… · Letdown2491/signet@7a0cf23
… via the Android app to set up a new server. Additionally, fixed several compilation issues that could cause issues when running signet-ui via p...