Since people increasingly use “indoor” materials for outside spaces, a vacuum would seem appropriate.
Blup
I often use my Festool dust extractor to vacuum our fake grass lawn.
She wot scowls at me did buy a leaf blower/hoover but it is painfully slow to use. The dust extractor with a wand is soooo much faster. I do however first rake up the leaves from our neighbour's holly tree. I don't want to damage my £100+ reusable bag.