You'll have to manually add these permissions to SuperiorSkyblock2/menus/permission.yml
Make sure that you type permission ids in lowercase
It should look similar to that:
kgenerators_use_flag:display-menu:truepermission-enabled:type:STONEname:'&6Generators usage'lore: - '&7Access to using generators inside the island.' - '&7Currently &aENABLED&7.'permission-disabled:name:'&6Generators usage'type:STONElore: - '&7Access to using generators inside the island.' - '&7Currently &cDISABLED&7.'role-permission:name:'&6Generators usage'type:STONElore: - '&7Access to using generators inside the island.' - '&7Role: &e{}&7.' - '' - '{0}'has-access:sound:type:ENTITY_EXPERIENCE_ORB_PICKUPvolume:0.2pitch:0.2no-access:sound:type:BLOCK_ANVIL_PLACEvolume:0.2pitch:0.2
kgenerators_pickup_flag:display-menu:truepermission-enabled:type:STONEname:'&6Generators pick up'lore: - '&7Access to pick up generators inside the island.' - '&7Currently &aENABLED&7.'permission-disabled:name:'&6Generators pick up'type:STONElore: - '&7Access to pick up generators inside the island.' - '&7Currently &cDISABLED&7.'role-permission:name:'&6Generators pick up'type:STONElore: - '&7Access to pick up generators inside the island.' - '&7Role: &e{}&7.' - '' - '{0}'has-access:sound:type:ENTITY_EXPERIENCE_ORB_PICKUPvolume:0.2pitch:0.2no-access:sound:type:BLOCK_ANVIL_PLACEvolume:0.2pitch:0.2
kgenerators_open_menu_flag:display-menu:truepermission-enabled:type:STONEname:'&6Generators pick up'lore: - '&7Access to opening generator's menu inside the island.' - '&7Currently &aENABLED&7.'permission-disabled:name:'&6Generators pick up'type:STONElore: - '&7Access to opening generator's menu inside the island.' - '&7Currently &cDISABLED&7.'role-permission:name:'&6Generators pick up'type:STONElore: - '&7Access to opening generator's menu inside the island.' - '&7Role: &e{}&7.' - '' - '{0}'has-access:sound:type:ENTITY_EXPERIENCE_ORB_PICKUPvolume:0.2pitch:0.2no-access:sound:type:BLOCK_ANVIL_PLACEvolume:0.2pitch:0.2