Yes, you can try a few things to help Facebook push your content to a US or UK audience:
Post Timing: Post when your target audience is most active (US/UK evening times). This can help the algorithm notice the right audience.
Page Settings: Make sure your page’s primary location or audience targeting in post settings is set to US/UK.
Boost Posts: If you use paid promotion, you can directly select the target countries. This helps Facebook understand who should see your content.
Engagement Signals: Encourage friends/followers from the US/UK to engage with your posts—likes, comments, and shares—so the algorithm starts prioritizing that audience.
It may take some time for the algorithm to adjust, but consistency with targeting and timing usually works.