Solus itself does not track anything. Not even how many users it has / what DE they're using etc. Any data they have access to is as complex as, how many people are currently seeding the torrent of Plasma vs Gnome which anyone downloading / seeding the torrent has.... aka completely useless.
However Solus is not outright against telemetry which can be useful for application development and support. Applications in the repository such as vscode
may have telemetry enabled by default (you can disable it and none of the information goes to Solus regardless). So the question is what do you use, do you change default settings to fit your preference, do you care that someone knows that you (not specifically you but an anonymous user x) use vscode
for writing bash scripts and that it crashed under xyz conditions.
Generally speaking, Solus is no more inherently "secure" than most other Linux distro's by default. An is only more "privacy friendly" than distros that are actively enabling telemetry such as Ubuntu does on search.
tl;dr Solus does not track anything but software in the repository might (default setting) and if so you would have to disable it such as for vscode
, firefox
etc. which are not tracked by Solus but application defaults settings that collect data such as crash reports.
PS. I am not a Solus team member this is just my understanding of Solus policy.