Hi JamesYou,
welcome to the Apple (user-to-user) Community!
Am no expert in this area, yet your question surely deserves some response.
Re: "apple switch control tap multiple times at once"
tapping multiple times at once : this seems to be like tapping two or three times to control some features
(double-tap .. triple tap etc.)
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Re: I want to press multiple buttons together,
but if I run another switch while using 1 switch, it keeps disable the one before.
Apple support has article online (links below) that may be helpful in finding answers:
If needed:
You may want to contact Apple's Accessibility Support Team:
See : How to contact Apple for accessibility support - Apple Support
or
Apple's Accessibility Support Website
(NB: You can "Get Support" (online chat / phone / email etc.) from the link at the bottom of their website:)
Accessibility Support - Official Apple Support
All the best :-)