Unable to access RDS over tailscale

Tailscale version - 1.28.0
Your operating system & version - MacOS Monterey 12.4

I am trying to access RDS over tailscale but not able to reach it . I have followed all the instructions on the official guide.
Have exposed the subnet routes where RDS is available and I am able to access the EC2 machines over tailscale in that subnet but not RDS.

RDS security group config

Any help would be appreciated

This is the tailscale security group setting