Most probably yes and yes. However, I would not suggest doing either of those things if you do not have the technical capacity to do so.
Good day guys, im planning on upgrading to xps 15 95 spec - Dell XPS 15 9520 15.6-inch Core i9-12900HK 32GB RAM 2TB SSD GeForce RTX 3050 Ti Win 11 Pro Laptop.  Is it possible to run ubuntu on external drive which will be plugged on the laptop? and also be able to be able to dual boot to windows and linux.
run unbun 22 LTS on XPS 15 9520