Hi VanGogh, and welcome,
Your question is actually spot-on, as I’m working on many classical pieces now and need this badly and was planning to bring it forth as well.
But to answer the question, I’m afraid no. I’ve looked everywhere but to no avail.
The only way to achieve something like this is to make a great multitude of tempo markers with minimum value differences. However it soon becomes a mess. But still, it works.
So adding a big +1 here and expanding a little bit; A Tempo automation choice in the Master track would be just great 🙂
All the best and good luck
CC