[Organization schema] Which Facebook page should be put in "sameAs" if our organization has separate Facebook pages for different countries?

[Telsenome]

We operate in several countries and have this kind of domain structure:
example.com/us
example.com/gb
example.com/au

For our schemas we've planned to add an Organization schema on our top domain, and let all pages point to it. This introduces a problem and that is that we have a separate Facebook page for every country. Should we put one Facebook page in the "sameAs" array? Or all of our Facebook pages? Or should we skip it altogether?

Only one Facebook page:
{
"@type": "Organization",
"@id": "https://example.com/org/#organization",
"name": "Org name",
"url": "https://example.com/org/",
"sameAs": [
"https://www.linkedin.com/company/xxx",
"https://www.facebook.com/xxx_us"
],

All Facebook pages:
{
"@type": "Organization",
"@id": "https://example.com/org/#organization",
"name": "Org name",
"url": "https://example.com/org/",
"sameAs": [
"https://www.linkedin.com/company/xxx",
"https://www.facebook.com/xxx_us"
"https://www.facebook.com/xxx_gb"
"https://www.facebook.com/xxx_au"
],

Bonus question: This reasoning springs from the thought that we only should have one Organization schema? Or can we have a multiple sub organizations?