Most sellers do offer commercial rights, but it’s an add-on “Extra” that you pay more for, so you won’t necessarily see it on the gig page.
Most sellers don’t include commercial rights in the package price. I’ve mostly seen it as an add-on. Add-ons aren’t visible until you’ve clicked the order button. Then there will be a list of suggested add-ons.
I don’t think there is a filter to restrict search results to commercial rights, unfortunately. There should be! If you suggest it to Fiverr customer service, they may consider adding it. In the meantime, I suggest you message sellers you are interested in before ordering and ask them how if their orders include commercial rights and if there’s an extra charge.