Right non functional kidney.

Appendectomy done in 2016.in that USG abdomen it has been mentioned that right kidney is small but doctor had'nt told us.after 3 yrs i.e in 2019 he had problem of bed wetting regularly.so,we have done check up.there, doctor suggested to do USG abdomen,in that it shown right kidney totally shrunken and poor cortical function.and dmsa also done-right kidney 4% left 96% function.no antibiotics suggested then and they said leave it..it doesn't cause any problems.back then in 2023 he had been slightly having pain in right reneal angle and fever sometimes.in 2024 again we consulted doctor with dmsa,mcug ...in mcug grade4 reflux for right kidney.. left is normal...now too he is having pain continuously...my doctor suggested simple laproscopic nephrectomy...is this a good option? Will this be any problem and cause left kidney reflux? Is reflux can be given?? Will it cause any pain after nephrectomy??