Trigger can't handle a volume of events at once, so the speed seems throttled

Trigger can't handle a volume of events at once, so the speed seems throttled

I am creating/updating from Hubspot Companies to Zoho CRM Accounts, and my flow works as expected. The flow triggers on updates to Hubspot Companies. On Sunday nights I get updates to about 3000 companies in Hubspot. Those should then trigger the updates to Zoho CRM, but here I am two day later and I only see about 400 updated.

Does a flow only do one record update every five minutes, even if there are many that meet the trigger criteria? Is there a way I can increase the throughput?

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