We have actually 4 Product Owner related to the same product and me as "chief product owner" having the final responsability but mpre or less in the role of a p

We have actually 4 Product Owner related to the same product and me as "chief product owner" having the final responsability but mpre or less in the role of a product manager doing the external work, working on strategic decisions, presales ... We need to have several teams in parallel and each team requires a product owner so we have to split the roles to get a common face and voice to externals. What is your opinion in such a situation?