No. Postgres data files are 1Gb each. When you change just one byte in a table, a whole 1Gb file gets updated (just 1 byte change, effectively). Your file-based backup tool now has to upload 1Gb of data to save 1 byte of actual changes.
It was a major pain point for my backups for years.
They create a new file with the diffs of a bundle of Postgres files, and upload that to blob storage.
For example, tools like Plakar (contributor here) split data into smaller immutable chunks and only store the modified ones, avoiding full re-uploads of 1GB files when only a few bytes change.