Within solvers, you can do something called "node locking", which means you "lock" a tree in the game node to play a fixed strategy. You would typically lock it to play as you suspect your opponent plays. This lets the solver calculate the optimal exploitative solution against your specific oppoents.
Piosolver, the first public solver and the one mentioned in the article, has this feature.
However, what often happens is if you lock one node, then several other nodes in the game tree over-adjust in drastic ways, forcing you to lock all of the, which may be infeasiable. As a result, Piosolver recently introduced "incentives", which gives a player in the game an additional incentive to take a certain action . For example, you may suspect your opponent calls too much and doesn't raise enough, so you can just set that incentive and it will include that in its math equations and give you something similar to an exploitative solution with a much simpler UX.
This feature was literally just introduced a few months ago so it's still very much an active area of research, both for game theory nerds, and people trying to use the game theory nerd research to make money !