A strong recreational cyclist might have an FTP of 4 w/kg (FTP = functional threshold power = power one can maintain for an hour in perfect conditions). I can hit that target at peak fitness, but most of the year, I'm well below.
Mathieu van der Poel is about 75kg with an FTP above 400 watts. Over 5w/kg. He's a relatively heavy professional cyclist, but an amazing all around cyclist who can climb, sprint, and win just about any day.
Tadej Pogacar, the current Tour leader, weighs about the same as me (68kg), but has an FTP somewhere around 400 watts. Or 5.8w/kg.
Of course, 1 hour power isn't everything. The 5, 10, and 20 minute power these guys can generate is even more mind-boggling (not to mention more critical on race day, as they have to cover attacks and break-aways).