Make your own relay. https://nostr1.com/ A tool to rebroadcast all your notes to other relays

GitHub

GitHub - jaonoctus/nostr-rebroadcast: This tool allows you to take events from one relay and publish them to another

This tool allows you to take events from one relay and publish them to another - jaonoctus/nostr-rebroadcast

Combine those and 💥Boom! you're backed up. Running your own relay on start9 or umbrel is probably better, but this works in the meantime!