Reviewer roster
Nobody has signed off a page yet. Review badges name a person, a date and a conflict-of-interest statement; this roster lists everyone who has done so, with a level by count of pages reviewed. The first name here could be yours.
Levels are editorial labels by number of signed-off pages, not credentials. Roles and affiliations are as stated by the reviewer and verified by a maintainer through the profile URL. A review is a statement about a page on a date, not an endorsement of any product.
Join the roster
Pick a page from the review queue, read it against its sources, and open the review issue form. You will be asked for your name, role, a profile URL for verification, what you checked, what you found, and a conflict-of-interest statement covering the last three years. A maintainer verifies identity and records the review; the badge appears on the page and your name appears here. Reviews without a COI statement are not recorded.
Have a person record in OnCo? Say so in the form and the badge links to it.