For AirFiber to work, you need a robust 5G network (blanket coverage) and for that you need to have a good number of network sites which have been fitted with the 5G transmitters. And we all know that all of Airtel's cities and towns which they claim to have covered with 5G are actually just on paper (to seem like they are keeping pace with the Jio 5G rollout) where they have a handful of sites in a few localities which have the 5G transmitters. The only place where Airtel actually has good 5G coverage is Metro cities like Delhi and Mumbai which are also where the high revenue customers live, and thus the rollout in these cities.
Wait for Jio AGM on 28th August where Mukesh Ambani may reveal the Jio AirFiber rollout plans, my guess is that Jio will roll it out Pan India across all major towns and the prices will be lower than Airtel.