Ask HN: How do you create and track your grocery lists?

Shared (via iCloud Family sharing) list in Apple's Reminders app. Actually we have several - a shopping list (for groceries etc), one for DIY/hardware stuff, etc. I don't use the feature much but you can use Siri to add items to lists by name too - "Hey Siri, add milk to my shopping list" works as expected.

When I buy groceries I put the use-by date into a little program I wrote, then I get an email reminder to stock up before they expire. And if I bought some in the meantime then it just overwrites the existing entry.

I use that mostly for tinned food and spices that potentially can last years. And I use Alexa for the grocery list.

using IM chat group (whatsapp or telegram)

I write them down on a piece of scrap paper before going to shop if there's more than a handfull of items or I don't want to forgot Something.