There are three types of log data that can accumulate as a result of a bulk delete operation in Dataverse: audit logs, plugin trace logs, and flow runs.

Audit logs

If auditing is enabled for the table you are bulk deleting, then your audit logs will grow with a new log per row deleted. A system administrator can control how long these audit logs are retained (forever by default) as described here: https://learn.microsoft.com/en-us/power-platform/admin/manage-dataverse-auditing?tabs=new#turn-on-auditing

Plugin trace logs

You would only see an increase in trace logs if they are enabled in your environment and if your environment contains plugin steps that are triggered on delete of the table you are targeting. By default, trace logs are automatically deleted after 24 hours. More info here: https://learn.microsoft.com/en-us/power-apps/developer/data-platform/logging-tracing#enable-trace-logging

Flow runs

You would only see an increase in flow runs if your environment contains Power Automate cloud flows that are triggered on delete of the table you are targeting. By default, flow runs are retained for 28 days. More info here: https://learn.microsoft.com/en-us/power-automate/dataverse/cloud-flow-run-metadata#storage-use-for-flowrun-records