When I adopted "bonded" 8 month old littermates, I did not know that they would eventually "unbond" and reach the point where they just didn't like each other, and often battled.
I bought a Feliway diffuser which emits a pheremone which calms anxious cats and it has largely worked, much to my surprise. Louie no longer sports a scratch on his nose.
I rarely can fit both of them into an image because they are wary of getting too close to each other.
I was hopeful when I saw them on either side of the basket. They weren't in that position for very long. Due to the very fast capture of my Pixel 10 Pro phone, I was able to get Louie lunging towards Lola. This is a screen grab of the before and after captures on my Photoshop screen.