No matter how far enemy/ally is - you can always see them (even if it's just four pixels on your screen). In portable mode you might have issues because of resolution, but with a good scope or even just aiming down sights + hold breath (in-game button) - it's not a big problem. P.S. In handheld mode it could also help to lower fov for more 'zoomed in' perspective.
How is the draw distance on the switch far as being able to see enemies far away
No matter how far enemy/ally is - you can always see them (even if it's just four pixels on your screen). In portable mode you might have issues because of resolution, but with a good scope or even just aiming down sights + hold breath (in-game button) - it's not a big problem.
P.S. In handheld mode it could also help to lower fov for more 'zoomed in' perspective.