Im in year 2023 and in Copa Libertadores there's no var on group stages, however, Conmebol announces that Libertadores and Sudamericana will have Var in all of the stages as it knows, in this year, its only after group stages. I leave here a link from the news that announces the changes since 2023. https://www.ole.com.ar/ecuador/internacional/libertadores-sudamericana-var-2023_0_tAWyWpsIAX.html
Thanks