Filtering attribute data - create new entity with relevant data

Hello,
is it possible to create a new entity just with the filtered data?
in this example i would like to have an entity with all products in category “Top-Angebote”
Thank you!

- product: Beck’s Pils
  price:
    price: 10,49 €
    regularPrice: Knaller
  picture_link:
    - >-
      https://img.rewe-static.de/REWE48_2023/0108570/22381300-9_digital-image.png
  category: Top-Angebote
- product: Schweine-Filet
  price:
    price: 0,88 €
    regularPrice: Aktion
  picture_link:
    - >-
      https://img.rewe-static.de/REWE48_2023/2532018/34373114-11_digital-image.png
  category: Top-Angebote
- product: Clementinen
  price:
    price: 2,99 €
    regularPrice: Aktion
  picture_link:
    - >-
      https://img.rewe-static.de/REWE48_2023/1278457/32125145-12_digital-image.png
  category: Top-Angebote
- product: Müller Joghurt mit der Ecke
  price:
    price: 0,33 €
    regularPrice: Knaller
  picture_link:
    - >-
      https://img.rewe-static.de/REWE48_2023/0833533/4773550-63_digital-image.png
  category: Top-Angebote
- product: Mon Chéri
  price:
    price: 1,99 €
    regularPrice: Knaller
  picture_link:
    - >-
      https://img.rewe-static.de/REWE48_2023/3211738/1796350-80_digital-image.png
  category: Top-Angebote
- product: Lindt Weihnachtsmann
  price:
    price: 1,89 €
    regularPrice: Knaller
  picture_link:
    - >-
      https://img.rewe-static.de/REWE48_2023/3813231/4778170-24_digital-image.png
  category: Top-Angebote
- product: Campofrio Serrano-Schinken
  price:
    price: 1,99 €
    regularPrice: Knaller
  picture_link:
    - >-
      https://img.rewe-static.de/REWE48_2023/0515409/31641266-6_digital-image.png
  category: Top-Angebote
- product: Havana Club Añejo 3 Años
  price:
    price: 10,99 €
    regularPrice: Knaller
  picture_link:
    - >-
      https://img.rewe-static.de/REWE48_2023/5436664/2117590-69_digital-image.png
  category: Top-Angebote
- product: Landliebe Butter
  price:
    price: 1,49 €
    regularPrice: Knaller
  picture_link:
    - >-
      https://img.rewe-static.de/REWE48_2023/8070288/23993677-16_digital-image.png
  category: Kühlung

You can filter your list using templating. The output could be stored in an attribute of a Template sensor or in a To-do list.