A look ahead is simply a view of your current project but looking ahead for 2,4 or 6 weeks so you filter.. Data date + 2 weeks for a 2 weeks look ahead, or use your progress spotlight and set it to the weeks you require and you will only see work that must happen for the next 2 or 4 or 6 weeks whatever you set. This can then be detailed further if required and is Mostly used to plan ahead and make sure you have the required tools and equipment and resources to allow this work to happen.
It’s typically a schedule of the short term (3 week) for weekly meetings and 30-90 day for monthly review meetings. You don’t want to review a 30 page schedule or distribute such on a weekly basis. The team loses interest and focus.