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