Add a field to the reviewer submission

It’s possible to add a new checkbox to the reviewer submission? I’m looking for an hook or an hint to insert a new checkbox to the step 1 of the reviewer submission. Looking into the OJS code I’ve found many hooks for the article submission from which I’ve inferred some for the reviewer, but I need something similar to ‘Templates::Submission::SubmissionMetadataForm::AdditionalMetadata’ that I’ve seen is used by the OpenAIRE plugin to use its templates.

Thanks you very much