[ESMA 70-872942901-38 MiFID II MiFIR market structures Q&A, Q&A 6.2]

Yes, a CCP using an open offer trade acceptance model that receives a request for access from a trading venue using a novation trade acceptance model should grant that access unless it can identify how precisely the simultaneous use of an open offer and a novation trade acceptance model would give rise to significant undue risks that cannot be managed.