I think it could have some benefits. 2 issues I have are no one has that type of bike and second, with the girls I have, they are overly quad dominant and prefer to keep them off the bike.
We have used alternatives for tempo that included various med ball circuits. This is usually the case if player is injured. I had girl with dislocated knee cap do these types of circuits for 8 weeks and was able to maintain most of her fitness during that time when she couldn’t run or bike.