Germany: Captain Marvel (2023)

On matching Cards with Special Postmarks:

Used on Cover with Special Postmark:

France: 100 years Disney (2023)

"Document philatélique":

Germany: Birth Centenary of Otfried Preußler (2023)

Used on Cover with Special Postmark:

"Erinnerungsblatt":

[Incomplete] Austria: Centenary of the Bambi Book (2023)

On a matching Card with Special Postmark:

Maxicard [with Personalised Stamp]:

Germany: Iron Man (2023)

On matching Cards with Special Postmarks:

Used on Cover with Special Postmark:

United Kingdom: Paddington Bear (2023)

FDC:

France: 100 years Disney - Booklet (2023)

Switzerland: 50th Death Anniversary of J.R.R. Tolkien (2023)

Maxicards:

United Kingdom: Terry Pratchett's Discworld (2023)

Germany: Mainzelmännchen (2023)

On matching Cards with Special Postmarks [A third card with the highest value stamp got lost in the mail]:

Germany: Town Musicians of Bremen Special Postmark (2023)

On a matching Card:

[Appendix] Japan: Winnie the Pooh (2023)

Used on a Card with Special Postmark: 

France: Barbie (2023)