I am 5'10". I was 215 May 2019 and started cycling more and bought my first road bike (well, second. But does a Schwinn from the late '70s ridden when you were a kid count?) FTP was about 230. Got weight down to 188 by the fall with FTP up to 282. Weight up to the low 190s by Spring 2020 with FTP up slightly to 285 or so.
Stopped cycling from mid-June 2020 to mid-September. Weight ballooned back to 215. FTP dropped to about 250. Started cycling again and increased volume. Getting weight back to 190 wasn't too hard but it's been slow going and my lowest has been 186. FTP up a lot, though. I hit 303 last week. I blame my diet for the weight. It's not like I don't work out enough.
My goal is 175, though I think I could hit 165 and still be fine.