Below is the configuration to turn off port forwarding：
[admin@MikroTik] /ip firewall nat> print
Flags: X - disabled, I - invalid, D - dynamic
0 ;;; NAT
chain=srcnat action=masquerade log=no log-prefix=""

1 ;;; win2016
chain=dstnat action=dst-nat to-addresses=223.255.255.12 to-ports=3389
protocol=tcp in-interface=all-ethernet dst-port=3389 log=no log-prefix=""

2 chain=dstnat action=dst-nat to-addresses=192.168.88.13 protocol=tcp
in-interface=all-ethernet dst-port=80 log=no log-prefix=""
[admin@MikroTik] /ip firewall nat>

I don't understand a bit. When in-interface=all-ethernet is selected, if all-ethernet is replaced by in-interface=pppoe1, the forwarding cannot be successful. Directly invalid, what is the reason? ROS version is CHRx86_64 v6.49.7.Trouble the engineer teacher to point out the reason for this

According to the official manual, the pppoe option is selected, but it has no effect

So what exactly do you want to achieve? Explain in plain words ...

As noted, what is the requirement in terms of user traffic.
Trying to talk it but using config speak when you dont really understand MT rules is just confusing. ( lack of port mapping knowledge is the tip of the ieceburg and the config is ususally integrated with other functionality and needs to be understood within the greater context)

Also other things help..
a. Network diagram
b. /export file=anynameyouwish (minus router serial number and any public WANIP info)