How to to create vector search index on multiple columns in the delta table

[prasadvaze]

I want to create vector search index on a delta table using multiple "Embedding source column" from the table.  I don't see an option to choose multiple columns so what's the alternative?  create index per source column?  so multiple indexes for single delta table?   But then my front end Search App wants to search the delta table using index on both columns so how do I achieve that?   

[prasadvaze]

if not thru UI then is there another way to create index on multiple columns?   Or this on the roadmap for future?