in ~/.config/sway/config.d/application_defaults
comment out = put “#” infront or remove from file . or change “2” to number of workspace you want
# Assign workspaces
assign [app_id="firefox"] 2
for_window [app_id="firefox"] focus
assign [class="firefox"] 2
for_window [class="firefox"] focus
so it
# Assign workspaces
#assign [app_id="firefox"] 2
#for_window [app_id="firefox"] focus
#assign [class="firefox"] 2
#for_window [class="firefox"] focus
or replace firefox to application you want open on workspace 2
refresh sway to work if remember correct
# Reload the configuration file
bindsym $mod+Shift+c reload
EDit. Welcome to Endeavouros forum .