Element is able to use features called “Integration Manager” and “Identity Server”. When using an Identity Server, you can choose to link name, email, and phone number to your Matrix account. When using an Integration Manager, there’s a feature to share your location with others in chat.

As such, Vector discloses that they “collect this information”, although (except some diagnostics), this is completely optional.

(I am not associated with Vector, just interested in Matrix)