I have a number of published documents under two variants of my name -- "Eric V. Larson" and "Eric Larson" -- and would like to put them all under "Eric V. Larson".
When claimed by an author, ResearchGate automatically gives the author's name according to the name set in his profile, i.e. "Eric V. Larson" in your case. Is the list of publications in https://www.researchgate.net/profile/Eric-Larson-17/research complete? When you open each of the 32 publications you will see that for all the autor's name is given as "Eric V. Larson". There may be more publications in ResearchGate not yet attached to your account, i.e. not yet claimed by you. For these the author's name can also be "Eric Larson" or "E. Larson" or "E. V. Larson". See my reply to https://www.researchgate.net/post/Automatically_uploading_papers_from_Zotero_to_ResearchGate_any_plugin for instructions how to find papers not yet attached to your profile. In your case, the corresponding link is https://www.researchgate.net/profile/Eric-Larson-17/unconfirmed.