Custom SITs fine tunned in MIP

Hello Everyone,

Currently working on MS Purview Solutions greenfield deployment project for one of the customer for on-premise data and M365 data.

I have created few custom SITs classifiers with regex pattern in the MIP portal almost 3 months ago and it's classifying the data as expected but with some false positives.

All of them are fine-tuned to prevent false positives. It's scanning and classifying the newly created M365 data as expected.

However it's not reclassifying the previously classified false positive data. How can I forcefully rescan/reclassify the false positive M365 data.

I just want to reclassify the data with fine-tuned custom SITs to correctly classify the data before labelling.

One more question related to on-prem scanners.
I have started the on-prem scanners to scan all the SharePoint sites and Fileshares for any sensitive information.
Initially its ran full scan and later it's started as incremental scan.
Above scan started before creating the custom SITs and labels.

Now I want run a full scan just to classify the data with recommending the labels based on the sensitive data instead of enforcing and applying the label.

Can someone throw some light which options need to be select for just recommending the label instead of applying the label.

Current configuration as shown below: