AWS provider resource request

Would it be possible to have the equivalent of the “adopted” resource aws_default_route_table made available for aws_ec2_transit_gateway: aws_ec2_transit_gateway_default_route_table?

The reason/purpose is to be able to add Tags to it.

(I would rather not use the Transit Gateway’s default route table–just like I don’t use the VPCs’ default route tables–but I found it impossible to make cross-account VPC attachments “work” if I try to add them to a route table created by Terraform, due to the dependency of the VPC attachment accepter.)