As promised by Blizzard during Season 1, Stash Search and Stash Filters are finally coming to Diablo 4 with Season 2! In addition to a free text search, the new stash functionality will also include highlighting certain item types or rarities.
Diablo 4 Season 2 Developer Update Liveblog Players Will Gain 40% More Experience in Season 2
The newly introduced stash will let players interact with their loot as follows:
Highlight items by Item Type: