opnsense travel router

[lilsense]

Is there a small router that one can install opnsense on to use it as WiFi/router/VPN like hootoo Tripmate Titan or GL.iNet GL-AR750?

tia

[Alphabet Soup]

Both of those are MIPS, which is at best a Tier 3 arch for FreeBSD.  I don't speak for OPNsense but it's unlikely that much development effort would be allocated to making a MIPS build.

While not quite as tiny as the products you mention, a PCEngines APU2 with mPCIe Wi-Fi card and antenna seems doable.