I don't think there is any discriminations against Americans, it's definately not unrare to work with > 3 nationalities.
I think the issue is most likely that you are not living here yet, remote isn't frequent for where i live.
Send me an invite in Linkedin and give me a PM with your cv. I'm pretty sure a lot of recruiters ( that tried to recruit me) would be happy to suggest you to their clients :)
https://www.linkedin.com/in/nicosap/ ( cfr. Belgium), recruiters are pitching me for Netherlands, Belgium and the UK fyi.
If you want a job in the Netherlands or Belgium, Tweakers is a popular dutch platform and for IT, most companies don't care about nationality: https://elect.tweakers.net/