DRA,,
There is no magic number that is a guarantee.

It depends on what rate you choose. If you buy down the rate, your payment will be lower. It depends on property taxes and if there is mello roos. It depends on your insurance premium. Fire hazard areas have higher premiums. Depends on the source of income.

Loan approvals are a result of automated underwriting. Each borrower has a different scenario. The auto system factors in credit, income, assets, expenses, history and who knows what else. It is NOT a manual approval.
The info that you are providing cannot be entered to get an approval.

For a $546K loan at 4.50% 30 YR Fixed, A GENERAL answer to your question is probably at least $90K-$100K Could be more, could be less,documented straight salary…may need at least 2 years on the same job.
Income that includes bonus, commission or overtime may be viewed differently, as is self employment or other income.

People can still get approved to borrow more than they should be comfortable borrowing, but many times additional sources of income cannot be used, so the situation isn’t as crazy as it looks.

A real approval can be attempted for the cost of a mortgage credit report. $14 for 1, $22 for a couple. Without this exact info and an approval, general questions can only get general answers.
Even an underwriter doesn’t know what will get approved until they run the scenario.

Lots of people who think that they qualify for a loan today do not actually qualify.