Keep Blockstream.info in sync with Wasabi

Hi guys, I implemented a feature that intends to keep Wasabi backend's mempool in sync with Blockstream.info: https://github.com/zkSNACKs/WalletWasabi/pull/5118

This is what I do every hour:

1. I query the mempool txids.
2. I find which ones I do not have.
3. I query them one by one and feed them to our node through RPC.

My questions are:

- Is there anything I can do better?
- I send 7 txhex query to blockstream at a time. Is there some kind of rate limiting I'd have to pay attention?
- Getting txs one at a time is painful. Is it possible to ask for them in batches?