Hello @Matt Paver , Thank you for reaching out. The excel connector has a throttling limit of 100 calls per 60 seconds. According to the How to handle throttling problems in Azure Logic App guide you can set-up multiple connections for a single action so that data is partitioned for processing. You can use the For-Each loop for each connection as mentioned the guide shared above. You can run For each loop sequentially and parallelly according to your requirement just be aware of the concurrency limit. If excel connector permits retries you can also try the Retry policy solution mentioned in the guide.
Please let me know if there are any additional concerns. Thank you!