Do tunnels apply general settings?

Hello,
i did work with tunnels for quite some time but i never figured this out: Do they apply my general settings? Tunnels do show up as CNAME record at least for the HTTP(S) tunnels with proxy enabled. Do they actually apply my settings like Brotli or my Edge Certificate settings as well as workers? I do also have antoher question: how do i configure the catch all rule in the tunnels settings?
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