&search=
This one will enable the search bar with cursor ready to enter search text.
&userfilters=
Sadly this won’t open the filter window directly. But you can use it to pre-configure the filter. That’s like LINKTOFILTEREDVIEW() but the user can see what kind of filter is active and can change it.
In this example I have a Number column called “Amount” and set the filter to 1:
&userfilters=[[“attribute”,“Amount”,{“start”:1,“end”:1}]]