Headers swap over almost*** universally. Lots of information floating in the BRZ 2nd gen subsection.
Here's a reasonably indepth comparison of the OEM BRZ 2022 Header vs Borla UEL header.
With the video starting at the dyno comparison:
The channel also does an interesting comparison of the 2.0 Header vs the 2.4 Header bolted to the FA20. Looks like our 2nd gens used some exhaust tuning to deal with the torque dip.