Access local tailscale machine from AWS behind a relay

SUPPORT QUESTIONS
1

So I have a tailscale relay server 172.31.1.3 ( sudo tailscale up --advertise-routes 172.31.0.0/16 --accept-routes --advertise-exit-node) on AWS VPC(172.31.0.0/16) and I can access any of my aws ec2 machines within that VPC from my local server which has tailscale enabled.

How do i also make it so that the ec2 machines (172.31.1.6) that doesn’t have tailscale in the same VPC can access my local server? Is this possible?

I am trying to add a route to the ec2 machines (172.31.1.6) in the vpc by sudo route add -net 100.0.0.0/8 gw 172.31.1.3 eth0 and my route table looks like this

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         ip-172-31-0-1.u 0.0.0.0         UG    100    0        0 eth0
100.0.0.0       ip-172-31-1-3 255.0.0.0       UG    0      0        0 eth0
172.31.0.0      0.0.0.0         255.255.240.0   U     100    0        0 eth0
ip-172-31-0-1.u 0.0.0.0         255.255.255.255 UH    100    0        0 eth0
ip-172-31-0-2.u 0.0.0.0         255.255.255.255 UH    100    0        0 eth0

but I still cannot connect to my local server via the tailscale 100* address