That's make sense, base on this reddit thread^[1] cash app doesn't provide txid for bitcoin transaction they will only email you when the transaction is complete in other words it was sent successfully and confirmed in the blockchain network.

For this to resolve i suggest to cash app support^[2] and help center^[3] and tell them complete details regarding your issue.

[1] https://www.reddit.com/r/CashApp/comments/d55rlq/cashapp_btc_transaction_id/
[2] https://cash.app/contact
[3] https://cash.app/help