unable to change to other keyboard variants

[anispwyn]

    keyboard {
        xkb {
            // You can set rules, model, layout, variant and options.
            // For more information, see xkeyboard-config(7).

            // For example:
            layout "us,th"
            variant "dvorak"
            options "grp:ctrl_space_toggle"
        }
    
            repeat-delay 200
            repeat-rate 100
    }

I've set variant to dvorak but qwerty is still be used

[YaLTeR]

You probably want dvorak, with a comma since you have two layouts.