The only airline I’ve worked for that has the FO handle TLs in the takeoff roll was probably a (now extinct) wholly owned subsidiary of cessnapete’s employer.
i actually prefer the captain owning the reject vs the FO and that was both as an FO and now a skipper. As mentioned SOPs and responsibilities are designed around this. I’ve flown for airlines that allow FO taxiing and airlines that don’t. Different strokes for different chief pilots I guess.
The PM operating the reversers on landing I thought was strange, though I’ve never worked to that SOP myself.