Broadband provider's assign Google proxy IPs

[helicopter]

As the title suggests, I've been recently seeing that providers are assigning IPv4 and IPv6 addresses which resolve to "Google Chrome Prefetch Proxy". I've seen this in 2 providers till now:

1. Jio Fiber
2. GTPL Hathway Broadband

My question is why are they assigning a Google IP after NAT? Those IPs are also flagged as Suspected Network Sharing Device. Is this a way to extend the deep packet scan that JioFiber already does?