Your adviser is correct.
Assuming you both have a combined income in excess of €73,600 for 2022, then as you are separately assessed, 20% tax is being paid on €69,800 (€36,800 + €33,000) of income when you could be paying 20% on up to €73,600.
Your unused band is €3,800 and your husband can accept up to €9,000 of standard rate band from you (€45,800 - €36,800).
You can transfer €3,800 by completing Form 12 online using myAccount.
See the Jennifer & Martin example here. I think it broadly matches your situation:
This page outlines separate assessment