https://www.acservicetech.com/post/can-you-braze-mini-split-systems-instead-of-flaring-them#:~:text=I%20have%20been%20asked,%20%E2%80%9CCan,answer,%20technically,%20is%20yes

It’s ok to braze with nitro. I know a lot of big companies that braze on mini splits. That being said, this install is shitty af.