Is it possible to have a realtime table that ingests from multiple Kafka topics? So I realtime table with 1 to many Kafka topic relationship

Yes. https://docs.pinot.apache.org/manage-data/data-import/pinot-stream-ingestion

Is this in Beta mode? Also, what is the required Pinot version for multi-topic ingestion and should the schema be the same across topics?

@Mayank Can the schemas for each topic be different, both combining to create a wide table? Assuming joined on time?

topic_a
product
unit
price
date

topic_b
location
seller
date

This was merged about a year ago so 1.3 should definitely have it. No, this is not for joining two streams on the fly.

@Jessica Stewart you can have a wide schema table, then each stream will be ingested with certain fields empty. there is no easy way to perform join on the fly, please check how flink does the window join etc.