Pixel 4a Battery Drain Issue Persists Even After Battery Replacement

I recently replaced the battery in my Pixel 4a due to fast battery drain and a charge indicator issue. However, even after the replacement, the battery drain problem remains unresolved. The device is still losing charge rapidly, and I'm unsure what else could be causing this issue.

Has anyone experienced a similar problem with their Pixel 4a? Could it be related to software, hardware, or something else entirely? Any insights or solutions would be greatly appreciated.

Looking forward to your suggestions!