When reading the pre-print A Falsificationist Treatment of Auxiliary Hypotheses in Social and Behavioral Sciences: Systematic Replications Framework I noticed they noted:
Submitted to Meta-Psychology. Participate in open peer review by commenting through hypothes.is directly on this preprint.
Could be another option @btrettel, even if you haven’t submitted your preprint anywhere.
ASAPBio is also trying to encourage preprint review. I went to their FeedbackASAP workshop last week and got inspired enough to review some preprints myself:
ASAPBIO also runs ReimagineReview which has listings for preprint peer review projects (some of which let the authors request reviews)