I moved my stake from another pool (where I received rewards while learning about becoming an SPO) to mine on August 15. It’s already been several epochs and still no regular rewards on my stakes. I had been thinking I would only need to go through the claim rewards process if my pool generated block rewards. Otherwise, the system contract would distribute non-block (i.e. regular) rewards within 4 epochs, 2-3 epochs in arrears.
So, it’s been that already and still no regular rewards. I use a single wallet for the stakepool. One of the other wallets I have is delegated to the stakepool; and it also has not received any regular rewards.