Education.com have some great games to practise digraphs.

You can find these games if you follow the links below:

Digraph Matching - match the digraph to the correct picture https://www.education.com/game/digraphs-matching/

Digraph Demolition -  listen to word, read word and knock down brick in the wall https://www.education.com/game/digraphs-demolition/

Digraph Hopper - make the big, fluffy monster jump in the puddle containing the word with the correct digraph ending https://www.education.com/game/digraphs-hopper/

IXL also have great overlearning activities.  Why not try spelling some words with digraphs? Use the link below the picture to go to their site.

https://uk.ixl.com/ela/year-2/spell-the-digraph-word