Can I make a civic boost req recon units and not just scouts using xml

[heromedel]

I am really struggling with modding for civ 6 in general but even editing the civics file directly (after making a backup in a diffrent area of course) I just cant get it to work with a unit class such as Recon

I have tried quite a number of diffrent ways of typing it and diffrent google searches.

There is for example have_X_LAND_UNITS but changing land to RECON doesnt work nor does anything else I have tried such

Thanks