This is how the developers solved the problem with bot farmers.
Battlefield 6 received an update that removed the ability to complete activities and assignments in Portal mode. Now, all player-created maps with bots only give experience upon completion of the match, allowing you to level up your profile, but you can no longer unlock equipment or skins for operatives by playing with AI.
Previously, the developers promised to revise the tasks, making them less difficult, but immediately warned that it would take some time.