You can increase your FTP even using traditional base plans that never exceed zone 2, so you don’t have to work above your FTP to improve your FTP.
I mainly see PRs on ramp tests and outdoor rides, not typical workouts because they are not designed to produce PRs. Stick to the plan, you will notice improvement. And don’t be discouraged if your FTP doesn’t go up as much as you think it should, it’s not a linear progression.