I have found documentation on how to increase the service limits on automation for the server edition. Is it also possible to increase these limits of needed on the cloud version?
No, the Cloud service limits are https://support.atlassian.com/jira-software-cloud/docs/what-are-service-limits/ as I'd guess you've already found.
Atlassian won't change these, as they're there to prevent problems (that they'd then have to get involved in fixing)
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