I don't think it was canceled but just ended Naturally as most modern transformers show would last for 3 season with maybe some tie In media suttf like the two movies
I may have read ideas for after season 3 and that a season 4 may have been in mind, so it may have been cancelled.
Transformer shows generally last only 3 seasons at best (Rescue Bots is the outlier). It's been a trend since Beast Wars. And even then technically the UT was three different shows of 1 season each.
And before Beast Wars. G1 only got three full seasons as well. Cyberverse getting the "fourth season" specials actually puts it on the exceptional side. Kids age out of toys, so as toy-based media, individual TF shows can't afford to run that long before rebranding and doing something else. That's also why all the Japanese TF series have rebranded once per year—much like Sentai, Kamen Rider, Ultraman and Pretty Cure, aiming for the same age groups and with similar merchandise-tie-in. (And that's also probably why Takara-Tomy doesn't tend to adapt full three-season Hasbro shows without rebranding—Animated was an exception because it had short seasons and under 52 episodes. Even Sunbow G1 got rebranded in Japan as "2010" for Season 3, and the Hasbro Beast Wars cartoon had its second half rebranded as "Metals.” Japan didn't adapt the third seasons of either Prime or Cyberverse. Especially with the Japanese kids' media landscape pushing TF shows even younger. Kids grow out of what they're into at 7 by the time they 10, but they grow out of what they're into at 5 by the time they're 6. Speaking generally.)