Export data from Dynamodb incrementally (say: of last 24 hrs)

Question

I want to put a batch process to export upserts data from Dynamodb of last 24 hours only (every night). It's going to run in midnight and fine with some latency.

I know these options:
#1) scan the table(and having a updateDateTime attribute). But its going to be costly($$) as data grows.
#2) create a GSI on UpdateDate, and query this index using this partition key(hot partition issues, as well as extra cost of having a GSI and RCUs).

Tried this also https://aws.amazon.com/blogs/aws/new-export-amazon-dynamodb-table-data-to-data-lake-amazon-s3/ - but it exports all the data till a datetime (and not last x hours)

Tried Athena and AWS Glue option, but exported data is not incremental

Please advise if there is a better way?

Note: I dont need all the events happening on DynamoDB (otherwise streams is a option). I want to export the end of the day snapshot(but incremental)