What is the opinion of Reddit about the
X-keys Video Switcher Kit for vMix (124 Key, T-bar)?

There are a few remotes you can use with tablets which sort of mimic switcher buttons. Another more expensive option are device the plug in to usb but emulates a tradition switcher. I found one on Amazon (https://www.amazon.com/X-keys-Video-Switcher-vMix-T-bar/dp/B07MTQWFKV). I have seen others as well. No idea how well they work