Set up filters, then tap Save These Filters… at the bottom of the filters to keep them as a Saved Filter. Give it a name and tap the checkmark (or Done). Saved Filters can be used anywhere you pick recipes or items. Turn on Show on Home in a Saved Filter to see its first few recipes or pantry items on the Home tab.
Pick one from the Saved Filters button after Pantry in the Kitchen tab’s top row (just an icon until you pick one); its menu also has New Saved Filter and Manage Saved Filters. After you change a Saved Filter’s filters, a dot shows on its button, and its menu offers Save Changes, Save as a New Saved Filter… or Revert to Saved. On a Saved Filter of pantry items opened from Home with See All, More → Add All to Shopping List adds everything in it.
Two are set up for you, Recently Added and Haven’t Made in a While, and they show on Home until you turn them off. Manage them in Settings → Saved Filters, where you can also put them in order or delete one. If you ever delete them all, tap Add some Starter Saved Filters there.