In the meantime I upgraded my hardware, so my initial FTP estimates probably are not really accurate, but here it goes.
Feb 2019: Tacx Vortex, only Strave for FTP estimates. FTP was 140. Just started structured cycling then (3-4 rides a week).
Mar 2019-Aug 2019: did a lot of outdoor rides based on HR alone. Bought Wahoo Element Bolt so I have GPS and could see HR for zones. Nutrition strategy was off, so I bonked a couple of times. Later, I discovered I only ate 15-20 carbs every half hour, so my rides were limited at around 90-100km. Did a lot of 90-100km rides. FTP increased as estimated by Strave up to 176.
Aug 2019: bought Tacx Neo 2, started TR with SSB1 (5 rides a week). Changed my lifestyle to fit around 5 rides a week. Became an early riser, became very careful about my nutrition. Basically, oats for breakfast. Salad, soup, bread and eggs for lunch. On training days, coconot yoghurt + muesli + banana in between lunch and ride. And after very hard rides, protein smoothie (hennep seed).
After SSB1, FTP was 196.
2020 FEB after SSB2, FTP was 212. Bought a power meter (s4 iiii)
Then feverish period around corona (not sure whether I had COVID-19 myself). Lost some FTP, gained some. Started build slightly lower with FTP 210, then upped it to 215.