Ah, that explains it, I was wondering what you meant by "compromising date".

Okay so: No, but it's worth mentioning that the xpub in the PSBT can be used together with any of its child private key to compromise its xprv pair.
But realistically, it's already available in the watch-only wallet so it doesn't add a security threat as long a you wont compromise any private key from the Cold-storage wallet.

If you want to see the contents of a PSBT, check its BIPs:

• BIP174: Partially Signed Bitcoin Transaction Format
• BIP370: PSBT Version 2
• BIP375: Sending Silent Payments with PSBTs