The issue about autoflowering plants is that they flower by TIME and they cannot be fooled to stay in vegetative period by turning the lights on for longer periods.
This means that these Ruderalis genetics of these plants know how old they are and will start flowering two to tree weeks after sprouting no matter what light cycle they get .
Because of this autoflowering trait these plants cannot be cloned effectively . For example if you manage to take a clone from a auto-flowering marijuana plant and you manage to plant it , it will flower exactly at the same time as it’s “mother”. This means that you’r newly taken clone will probably start flowering a few days after the cloning and nothing will return that little cutting back to vegetative stage as it is possible with regular short-day cannabis strains.
AUTOFLOWERS also cannot recover ( or have time to ) therefore it is not recommended.
You can LST autoflower plants ( depending on strain ) . Some growers have topped auto but the general rule is not to induce any stress for it will drop yield significantly.