Spoke was not forming tunnel with the Hub. Spoke would honor only Primary gateway DCE info (Hub details) in PG setup unlike cloud setup.
Hub was not having tunnel Spoke's primary gateway due to which Spoke didn't receive HUB information from it primary tunnel .
All SD-WAN versions
Hub was not having tunnel Spoke's primary gateway due to which Spoke didn't receive HUB information from it primary tunnel .
Enterprise Hub's should be having all the enterprise Partner gateway added in GW handoff. Its best practice and recommended