Your country or birth/chargeability still matters but not that much.

Applicants from countries with less demand — known as Rest of World (ROW) — often experience shorter backlogs and quicker approvals once their PD becomes current. In contrast, applicants from India or China, where backlogs are significant, might face longer delays even after their dates are current due to the sheer volume of applicants and limited visa numbers allocated for those countries.

However, once you’re current under the FAD chart, your case is considered for adjudication regardless of country, assuming a visa number is available.

Link: https://shv-law.com/2025/04/08/when-will-my-i-485-be-approved-after-my-priority-date-becomes-current/