Pending skilled worker visa and stage-1 GT

As far as I know, it is not eligible to have 2 simultaneous visa applications. However, looks like stage-1 is not a visa application.
Does somebody have experience applying to stage-1 during the process of skilled worker visa consideration?

I think there is no issue with applying for a global talent visa, as long as you are eligible for it.

From your question, I guess you are currently in UK, and the only restriction is clearly stated that …

Who cannot apply to switch to this visa
You cannot apply to switch to this visa if you’re currently in the UK in one of the following circumstances:

Read more at: Apply for the Global Talent visa : Switch to this visa - GOV.UK