Can Zyxel Keenetic Start be used as a Bridge?

Question

Computer networks

There is a renovated Moscow apartment. Optics has been introduced into the hallway next to the door, a PON modem is hanging. Laptops-smartphones with WiFi walk around the apartment, everything suited everyone. Now there is a task to organize a "Home Office" in the kitchen - 2 laptops and an MFP. Moreover, a laser network MFP (not WiFi) can only be placed on a high refrigerator, a 3-meter USB cable from the MFP to the nearest laptop is not enough. Throwing a cable from the modem to the kitchen is unrealistic. There was an idea: to connect laptops and MFPs to Ezernet with a wire, and connect via WiFi to the Internet - an existing PON modem.
Zyxel Keenetic Start is available. I tried to set up WiFi on it in client mode. Result: Keenetic connects via WiFi to the PON modem as a provider, distributes addresses from its DHCP and Internet over wires, and another network behind NAT is obtained. It was not possible to configure it as a Bridge - turn off Keenetic's DHCP so that the PON modem distributes addresses - it was not possible. Actually questions:
1. Can Zyxel Keenetic Start be configured in WiFi Bridge mode - so that its WiFi client and LAN ports are in the same VLAN?
2. If not, what problems can be caused by double NAT? On laptops behind double NAT, RDP access to servers, bank clients with RU-Tokens, Kontur, Skype are used. In short, bookkeeping.
3. How else can you organize the network infrastructure of the Mini-Office - 2 laptops + network MFP, you need to print, scan to / from the MFP to both laptops, of course you need the Internet?

Answer 1

It seems that you can eat special firmware from third-party manufacturers

Answer 2

Everything is easy to do:
1. Kinetics is assigned local IP from the modem's network, register the modem as a gateway.
2. Disable the DHCP server on the kinetics
3. Connect a link from the modem to any LAN port.
The most important thing is that the kinetics mode of operation is a regular router (no wifi clients are needed)

Answer 3

What you need is called WISP. Kinetic Start is now doing great (well, actually, so-so) with him.