You have set it to 10,000 as Top Count, so the flow should be retrieving up to 10,000 records.
If you are not getting the expected result, this might be related to the query you are using to filter the records. Make sure that you are using the correct filter conditions and that your query is returning the expected set of records.
You can also try reducing the number of records and test the flow, it may be possible that the flow execution is taking too long to finish.
It's also worth checking if you have any filters on the Salesforce view you are getting the records from, it could be limiting the number of records retrieved.
As part of the free plan, you will have access to a limited number of connectors, and some connectors may be rate limited. However, it can be possible that you have a free trial of Power Automate premium features enabled.