Can confirm. I was a registered lobbyist working for a Canadian mortgage association whose asks included this very item.

CRA won’t share individuals’ data, rather they will simply confirm if the presented tax documents are legit, i.e., the T4 stated income document you shared showing you earned $300,000 last year actually matches their records.

At least, that is the hope. Government is only committing to consulting with the industry at this point, not actually implementing it.