Hi @anantha rengan kannan I am by no means a SharePoint expert, but hopefully a more knowledgeable individual can share some insights. I did, however, come across SharePoint Framework (SPFx) Extensions that may help. There is a Search Extension, https://learn.microsoft.com/en-us/sharepoint/dev/spfx/building-search-extensions, however it doesn't stipulate how to configure an Azure Search like index. There is also Tutorials and training for SharePoint Development | Microsoft Learn which may be helpful.
I think the best bet is creating a search index from a SharePoint list. You look into using SharePoint indexer (preview) - Azure AI Search | Microsoft Learn which is an indexer that connects to your SharePoint document libraries; however, it may not support facets like what you're looking for.
EDIT 7 Mar 2024 I've followed up with the product team. Filtering and faceting are independent of how and from where data is being pulled/pushed into the index. Once you've indexed the SharePoint data, you can apply the faceting yourself and filter the way you want.