In 2019 I asked about something related to this here, but as I got a warning for reviving the old thread, here we go.
In the settings for vertical positioning of tempo markings, there is clearly an indicated base line in orange:
However, in real life the base line is lower:
As you see in the image, it runs along the lowest part of each Tempo Text.
For what I am working on right now, I have many places with Tempo Text+Staff Text underneath and I need a predictable distance between the two.
I will handle this manually, I could not find any setting to take care of it. Is it intended and ideal that the base line aligns with the lowest extender of the text? If so, the settings illustration should probably be changed to reflect that.