Platform API: GET /api/v2/trunks returns 404 for BYOC edges in Asia/Singapore

Context:
I cannot figure out why the Platform API is failing to list our 15 BYOC trunks in the Asia/Singapore region. Using SDK v2.1.4, GET /api/v2/trunks returns a 404 Not Found, despite the trunks being active and registered via our SBC. Direct calls to the Singapore endpoint confirm the issue persists across multiple tokens.

Question:
Is there a known limitation or specific permission scope missing that prevents retrieving BYOC trunk metadata via this endpoint in our region?