This is my comment to the other person, I just don't want to type the same ideas out a second time:

I read it. They also have no source or evidence.

Signals database, which we must assume is compromised due to its centralized and US domiciled nature, has a few important pieces of data;

You can't simply say "we must assume" as evidence. In fact, they implemented "Sealed sender" in 2018 where they are not able to see who the message is being sent to.

They are also legally required to provide all information they have on users for warrants and subpoenas. Any time they do that, they post the (slightly redacted) document they provided to the courts. See the list here: https://signal.org/bigbrother/ This confirms they did not have any metadata on those users. The only info they have is what they openly state (phone number, date of registration, and last time a message was sent).

While there may be other US government requests they are not alllwed to disclose, they were legally required to provide the same information to the courts, and we can see what they provided.

And sure, while the US government funds Signal, you know who else endorses it? Edward fucking Snowden. If anyone knows about secure messaging, it's the man that physically removes the microphone and camera from his phones before using them.