These travel routers [0] [1] support OpenWRT and/or Wireguard, as client and server. They also support connectng to captive portal WiFi networks so they're perfect for travel.

[0] https://www.gl-inet.com/products/gl-ar750s/

https://openwrt.org/toh/gl.inet/gl-ar750

[1] https://www.gl-inet.com/products/gl-ar300m/

https://openwrt.org/toh/gl.inet/gl.inet_gl-ar300m

Sure, it’s a NeXX 3020: https://openwrt.org/toh/nexx/wt3020

I have two of them, and use one as a Wi-Fi client/NAT/VPN gateway/ad blocker when I’m at customers and some hotels.

Setup is pretty trivial, you can do a lot with LuCI and the OpenWRT packages.