No, as Redis isn’t a simple cache, but handles a lot of counting, rate limits, background jobs, pub sub. Having multiple Redii will result in corrupted counting and broken behavior.
That would do it, but adding a managed Redis, managed PostgreSQL, managed Load Balancer, Object Storage, Container Registry will also be more expensive than just paying for our standard hosting and a lot more complicated to maintain.
At that point the intersection between people who want to pay hundreds of dollars per month and don’t care if their service go down because of a SPOF is quite small, and it becomes more a hobbyist setup than what we would recommend for forum admins.