In Jyotiṣa, multiple yogas can form in a birth chart but not all become functional. Some yogas are defunct, and some are dependent on the dasha. Sun is the initiator of all Rājayoga; hence we also need to activate yoga via mantras or yantras.
Some yogas are Bhavishyat Yoga’s (Future Yogas) that will fulfil in another lifetime. Finally, there is Kriyaman Karma or current actions, which depending on good or bad, can initiate or destroy a Rājayoga. Never underestimate the power of Shiva’s trident!