How to know available UTXOs for C-CHAIN and P-CHAIN?

[f-squirrel]

Hi folks,

I was digging the documentation but, unfortunately, was unable to find answers.

I need to receive available UXTO in C-CHAIN and P-CHAIN together with their finality (i.e. if I can already use them in future transactions).

I tried using the platform.getUTXOs API with the sourceChain parameter (once for P and once for C chains).

However, the response does not contain the block that includes the UTXO, i.e., I cannot determine whether it is confirmed.
The official documentation says that Avalanche uses Snowman consensus with sub-second finality. However, there is no information on how a user can know if a UTXO/TX is confirmed.

For the C-CHAIN, I can do getAtomicTxStatus with block height; the P-CHAIN does not provide such information.

Can I assume that the status Committed means a UTXO is available for building transactions?

I appreciate your help in advance.

P.S. I have tried to use Glacier API; however, it is minimal in terms of API calls/minute.