Need to be able to apply layout rules to 'Multi Pick List'
Currently, we are unable to apply layout rules to fields that are 'Multi Pick List'. This means we have to instead use checkbox fields, but they are inefficient.
For example, we use the Multi Pick List to list our products. However, we're unable to apply Layout Rules to this field. We want to be able to apply Layout Rules depending on what product is selected. Instead, we have to create a checkbox for each product. If we have 20+ products, this would mean we would need 20+ checkboxes.

Moderation update:
We have a primary thread to track the feedback and votes for the support of multi-select picklists in Layout rules. Please follow the below thread to stay updated on any advancements on this front.