relaticle/custom-fields v3.3.0 on GitHub

SectionForm::extendSchemaUsing() — extend the custom-field section management form from application code (e.g. a service provider), with no subclassing or vendor patching. A single registration applies to both the Add and Edit section modals, and the callback receives the current schema plus the section's entity type, so extensions can be scoped per entity (#165).
Free-form extra bag on CustomFieldSectionSettingsData — consumer-defined section settings bound under settings.extra.* now round-trip through the typed settings DTO (and through config import/export). Enables, for example, flagging a section to render as its own tab (#165).

Full Changelog: v3.2.1...v3.3.0