Back when I started cycling to work I was about 190 lbs, and riding to work about 3 days a week on average got me down to about 172 lbs. Then I got an ebike that allowed me to ride 5 days a week and that got me to about 165 lbs.Can I presume you are a lightweight person?
Then a diabetes diagnosis and a change in diet got me to about 157 lbs. The pandemic hit and then I was racing on Zwift about 4 to 5 days a week and those efforts were brutally hard. I wasn't trying to lose weight but the intense efforts resulted in my weight dropping to 147 lbs, and at that weight my FTP was in the range of 3.2 to 3.5 watts/kg. Since then I went off Zwift and put weight back on and I'm around 158 lbs now.