NAT Setup Question

RouterOS Beginner Basics
1

Hi all, I am currently setting up my Mikrotik hAP ac2 router. Here are some question on how to set it up correctly.

I have set my router WAN port to a public IP x.y.z.135/25 and Gateway as x.y.z.130 and plug it to the network. On the other hand, I have a device currently set to x.y.z.131/25 and Gateway x.y.z.130 and plug it to the Mikrotik router LAN1. My goal is to pass all the port and the IP address of my device to the network via the Mikrotik router and receive all data from the WAN (maybe something like DMZ). How can I achieve this or using virtual IP with 1:1 NAT help on this? Thanks in advance.
net.png
[Edit] Added Network Diagram, I would like my device use X.Y.Z.131 to the switch and receive data from the switch

2

Draw a detailed network diagram as your explanation is NOT understandable

3

added network diagram

4

I still don’t understand your setup.
Typically the Router has a public WANIP, either static or dynamic. OR if not a Private IP from an upstream router for example.

Behind the router is a DIFFERENT private subnet, so not sure what you are doing or what kind of network you have.
It would appear you need a switch not a router where the MT is located. Do you have an upstream router like an ISP router already in the mix??