Hi,
yes, these are newly added. I've reworked the logic and added two hidden string settings, one to disable sims by name (menu-simulations-disable-list) and one to keep specific sims enabled (menu-simulations-enable-list). These lists will be applied in the data and data-final-fixes stages. Vanilla sims are only removed in the data stage.
You can also import the menu_simulations_manager and mark sims as disabled by calling e.g. menu_simulations_manager.disable("aquilo_send_help"). To apply your changes you need to call menu_simulations_manager.apply().
You can test the changes in the now released 1.3.0 update.