HI Aleksi12,
You first test done 12 months ago was a qualitative test (reported as Signal / Cut Off). This test does not tell you how much HBsAg is in your blood, just if you have it in you blood or not.
The second result from Sept 7 2022 is a quantitative test (reported as International Units / mL) and does tell you how much HBsAg you have.
You cannot compare the two results. Its normal for HBsAg to not be affected by TDF as this drug does not affect the production of non-infectious subviral particles which comprise > 99.99% if circulating HBsAg.
As Kinoti has said, your response to TDF is measured by decline in your HBV DNA, which is a marker of viral replication.
Best regards,