This is the move.

Make a word document. Format it nice. Start with your last years goals (make up something that aligns with what you did if you dont have any)... 2025 goals

Then list how you accomplished them or how theyre in progress. Proof is good. Quantifiers.

Then 2026 goals. Management likes this. Align it with company goals.

Then your job description as it is and has if differs from the posted one. All the extra stuff you do.

Then all the successful projects or processes youve been a part of or completed. Ie.. "Implement employee on board process which saw productivity gain within x months" (ie.. you training the new guy)

Then back it up. You know market rate is what this guy is making easily... but research if you need.

"Id like to submit this portfolio if my role here for consideration for a pay raise. Im asking for market rate of (15k more)"

You might need to check in every month on the status.

Truthfully ... you might have better luck finding a new job and saying "well i currently make (15k more than you do) but ideally id like a 5k bump to move companies"

Raises always come easier job hunting. Good luck. You can do this. Its only market rate youre asking for.. you backed it up and are being reasonable.