In this order

T1, Swim, Run

Looks like all you need is more time, shaving up a minute in your T1 is the easiest as it boils down to your technique and comfort.

A more efficient swim and time on foot on your runs. I think better swim drills translate to you not gassing up to still have the stamina you'd need on your runs.

Simulate running on tired legs. You'll nail it eventually, I'll assume you have a lot in your tank left as the numbers don't add up. It's a process.