Yes bro, same option available in my samsung f15 5g mobile, I think after software update & depend on location it's working,
I had one doubt in network mode ur mobile showing 5g only, is it unable to change to 5g/4g/3g/2g(Auto Connect) option
Ur mobile showing Vo5G signal, i think after software update & it's working
As per below mentioned post this 3 persons also getting vo5g signal & when try calls automatically goes to VOLTE
Post in thread 'Reliance Jio has started Vo5G/VoNR'
Good News - Reliance Jio has started Vo5G/VoNR
Post in thread 'Reliance Jio has started Vo5G/VoNR'
Good News - Reliance Jio has started Vo5G/VoNR
Post in thread 'Reliance Jio has started Vo5G/VoNR'
Good News - Reliance Jio has started Vo5G/VoNR