Yes, Switzerland concluded multiple treaties:
or
The US also concluded a lot of treaties, which are maybe or maybe not better than Switzerland.
For example: If a US ETF buys a UK stock and receives dividends. The ETF provider will beneficiate from the treaty concluded between the US and the UK. In the end, you will indirectly beneficiate from this treaty.
In this case, if the US/UK and CH/UK treaties are the same, there is no advantage to buying the stock directly on the UK market
This area is very tricky and unless you managed millions, I wouldn’t bother with that.
Have a look at this page more info on L1 and L2 dividend tax withholding
https://www.bogleheads.org/wiki/Nonresident_alien_with_no_US_tax_treaty_%26_Irish_ETFs