Difficulty in understanding how PGP secret keys are synced

I am using 2 PGP keys (A and B) and 2 devices (P and Q) with keybase CLI client.
After importing the keys to keybase and removed private key from keybase site (sorry cannot remember exact order of operations), I found that the export of private (secret) key are working differently in 2 devices:
- keybase client in P can export secret key of both A and B
- keybase client in Q can export secret key of A but not B

After reading [Local Key Security](https://keybase.io/docs/crypto/local-key-security) I assume P and Q now have different set of secret keys in their 'keybase local keyring', but cannot figure out a way to inspect under the hood.

Can I ask what is a supposed way to synchronize the secret key again (with keybase, CLI only if possible) ?

Start with the linked Local Key Security documentation and the keybase CLI entry points for exporting secret keys. Compare the reported behavior for devices P and Q and determine whether a supported synchronization or inspection procedure exists; done means documenting that procedure or confirming the behavior is unsupported.

Written by the indexing model from the issue text.