I had mistakenly launched a db.r6g.large PostgreSQL instance and deleted it instantly while under Free Tier. I also deleted all the snapshots as well. Yet, I see daily increase in the bill by a few cents. Anyone knows what to do there?
The db.r6g.large
database would not qualify for the Free Tier.
Therefore, the bill is showing a charge for the instance that you launched.
Since you turned off the instance and deleted the snapshots, the charges should not increment any more.