Reasons why Jedtavius is canon but not blatantly expressed
The time of release:
In the first interview which is about the third movie, which came out in 2014 (same-sex marriage was legalized in all 50 states in 2015 btw)
Owen Wilson says,
“There's been a big sort of transition from that antagonism and bickering... flowed into... almost a love, although they'd never admit it.”
In the video you can see Shawn Levy perk up as soon as Owen mentions ‘love’ and is very quick to correct “a brotherly love”
I assume this is because the movie had already been accused of pushing an agenda because of Octavius’ remarks about Lancelot; saying he was “handsome” and had “hypnotic blue eyes”
At the time having a gay character(s) in a kids movie was still considered ‘taboo’ and could lead to some issues causing the film not being able to be shown in certain places.