I'd still call that multi-cloud ;) I've done something similar in the real world. We used cloudflare for our dns / application firewall, but we kept a route53

I'd still call that multi-cloud ;) I've done something similar in the real world. We used cloudflare for our dns / application firewall, but we kept a route53 zone mirrored after cloudflare had a spat of issues. It would have let us switch our dns provider as quickly as dns would allow if we had to drop cloudflare.