It could be useful to have a 'Delete branch database' checkbox (with a warning) that can be selected when merging a feature branch back into a protected branch (e.g. develop). If checked, the feature branch database would be automatically deleted after the merge process is complete.
While the entire branching and merging process is currently handled within the Software Factory, the feature branch database remains on the database server even after the branch is archived. This means users still need to manually remove it via SSMS, which adds an extra step. Having this option within Software Factory could streamline the process and ensure better cleanup after merging.

To prevent accidental deletions, the checkbox could be unchecked by default and:
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Only showing when the merge strategy is set to 'Archive branch automatically after merge'.
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The source branch is not protected.
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The source branch database has a different name than the target branch database.
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Maybe show a warning when checking the box