Yes, now I am able to open the router home page and DL & UL speeds are around 95 Mbps as earlier. May be some maintenance works as can be expected during testing phase.
There is a feature in My Jio App to rename the each device which is connected with our home Jio Gigafiber wifi ONT. But when I changed the name of any device in MyJio App it get revert back to its previous name of random name or numbers like MAC1. I have also factory reset the modem but issue not resolved.I am able to open the Router home page as before WITHOUT changing the gateway IP. Only some temporary local issue. The speeds also are as before. Just an outage of a few hours.