If you search with its package name (“org.wordpress.android”), it appears, but the Install button displays “N/A”. If you click on it, it says (that’s in French because my OS is configured in French):
Application non supportée!
L’application Wordpress - Création de sites n’est pas supportée actuellement. Cela peut être dû au fait que l’application n’est pas encore publiée largement ou à une autre erreur.
NB: I could manually install this app with Aurora store
For me I have seen the N/A thing when using Anonymous. With a G account an app will then be installable.
Wordpress shows up in a search also. When I went back to Anonymous, and cleared cache for testing, it did not show up. Had to use package name also.
But it was installable either way.