In my project, most crates are a part of a workspace (indicated by the project root Cargo.toml with a [workspace] section)
In these crates, I get no lifetime indicators. Maybe that related to the fact that RustOwl seems to create an owl subdirectory in the target directory, so in these cases, there is nowhere to put it.
There are some files that are not in a sub-crate, and for them, the lifetime annotation works.
Tested with latest RustRover and IntelliJ. RustRover: Build #RR-251.25410.115, built on May 7, 2025