It's anecdotal, but on the F# Software Foundation's slack workspace[1], 4 out of the last 5 postings in the #jobs channel were in Europe.

No doubt, any company that picks a niche programming language as their business's lingua franca is taking a risk. For me, though, that is an indicator that they care about quality and do not have a culture of treating engineers as replaceable assembly line parts.

[1] https://fsharp.org/guides/slack/