AWS Transit Gateway Peering Daisy Chain

Hello,

TransitGateway supports Inter as well as Intra-region Peering.

See below blog for more information on this topic:

https://aws.amazon.com/blogs/networking-and-content-delivery/aws-transit-gateway-now-supports-intra-region-peering/

As for Peering you can do fully mesh of TGW peering as shown in the Whitepaper below:

https://docs.aws.amazon.com/whitepapers/latest/hybrid-connectivity/aws-dx-dxgw-with-aws-transit-gateway-multi-regions-more-than-3.html

Typically 1 TGW per region is used but yes, technically you can have multiple TGWs within 1 region and can do Intra-region peering between them.