@EnjuAihara Did you use the command I gave you? It's both shifts to toggle
@EnjuAihara
setxkbmap -model pc105 -layout is,ru-is -option caps:swapescape grp:rctrl_switch grp:shift_caps_toggle compose:sclk shift:both_capslock
look at the -option part
caps lock = escape
shift+shift = caps lock
escape = caps lock
shift+gaps = change layout
scroll lock = compose key (compose+a+e = æ, for example. lots of useful combos)
@EnjuAihara forgot to actually link the list https://fsymbols.com/keyboard/linux/compose/