Perhaps, from man systemctl
isolate NAME
Start the unit specified on the command line and its dependencies and stop all others. If a unit name
with no extension is given, an extension of ".target" will be assumed.
This is similar to changing the runlevel in a traditional init system. The isolate command will
immediately stop processes that are not enabled in the new unit, possibly including the graphical
environment or terminal you are currently using.
Note that this is allowed only on units where AllowIsolate= is enabled. See systemd.unit(5) for details.
I haven't tinkered with it yet