Routes to ENI in VPC rt do not propagate to attached TGW rt

I have a VPC attached to a TGW in same account. I've added a couple of entries to the VPCs route table with an ENI (or instance) as target. I expected those new routes to propagate to attached TGW's route table automatically but they don't.

Should the routes in VPC's RT propagate automatically o do I need to add appropriate entries in TGW's RT targeting the TGW-VPC attachment? What could I be doing wrong?