Hi
Welcome to the site...
Two years ago I was in the same boat as you, I was 136KG when I got my Scott Sub Cross 10 which I then read was rated at 120KG so I was worried that I would have all sorts of issues ... speaking to people in bike shops and on here I was told that the bike would be fine, and if anything the wheels would be a issue..
Two years later (touch wood) my only issue is I had a couple of spokes break, now that may have been down to the weight, the rubbish roads that I use around here, country lanes that are not well maintained with ruts. and badly filled in pot holes or a combination of both...
With the aid of the gym 4 times a week, when they were open, diet and using the bike at weekends the last count at my diabetic check up was 108KG and no longer Type 2 diabetic... that was last September so I hope to be lighter now...
Best thing I did was get my bike, now off work on furlough I have done 14 miles each morning around the same country lanes for the last two weeks, and love it..
Just get out and enjoy it ...