The end of Jar

I've worked in fintech before. I can say that this will not have the impact that you think it will have. RBI might impose restrictions but they won't cutoff any business completely. Moreover Jar and Rupeek are just peer-to-peer products. They just connect banks and customers to disburse loans. That's it.
Even if RBI imposes restrictions these startups will be prepared for it and will comply to new rules.

The thing that happened with Paytm payments bank is extremely rare.

Eventually Google Pay will take all the market cap Phonepe can at a certain stage compete with them but I don't see any other apps even near this two

Jar does not do gold loan.

really what're the implications of this /?

Jar has kinda pivoted to become a jeweler of some sort. They started this thing called nek jewels.