Hi Ludberg, welcome to the forum!
This is a great question. I think the short answer is that you should be fitting some gym time into your training plan for sure. Where it gets complicated is working out how much and when. If you are in base phase then you can do maybe two or even three sessions a week of weights. But when you move into build you may find that your legs get toasted with that much gym time so you’ll need to cut back.
I would say that you don’t really need that much time in the gym either, as the two exercises for your legs that will really help with your watts are squats and deadlift. You then only really need to add a torso push and pull (bench press, rows) and a vertical push and pull (shoulder press, lat pull down or pull ups).
I can do 2 sets of 8 - 12 reps plus some core work and be out of the gym in 40mins.
Long story short - Yes to gym work, not too much during build phase, short gym sessions work best.
Hope that helps?