Alby Hub is not yet on the Raspiblitz, just doing the basic research: https://github.com/raspiblitz/raspiblitz/issues/4727.
Going through the docs it seems the best self-hosted option is to deploy on a VPS with a public IP address readily available: https://github.com/getAlby/hub/tree/master/scripts/linux-x86_64

The other option is using an instance of LNbits with the upcoming NWCprovider extension: https://github.com/riccardobl/nwcprovider
Soon to be in a new LNbits release: https://github.com/lnbits/nostrrelay/issues/13. There can also use phoenixd and Blink nostr:npub13ljnkd633c7maxatymv3y2fqq8vt3qk7j3tt0vytv90eztwgha9qmfcfhw as well as the funding source.