Use of st.multiselect

Hello, I use st.multiselect to give the user the choice of several simultaneous filters but
is there a way to make the filter list disappear after a single user choice like with st.selectbox ?

Not really disappear but you can use the max_selections parameter to limit the user selection. In your case:

max_selections=1

Hello, thanks

but I want to be able to filter on multiple items