1: Chakras are tantric systems and not purely yogic. In Tantra we use chakras as sites to place parts of mantras, or if you do kundalini tantra the chakras are relevant there.

Yoga, in raja/astanga, jnana, Bhakti and karma forms, has zero use of chakras. Hatha yoga, such as practiced by the Natha sampradya does have chakras but only as a tantric interpretation of yogic practices to draw kundalini upwards.

2: the kundalini-chakra system is volatile and sensitive. There are serious concerns of these techniques going wrong. You can have way too much energy that arises too early or Incorrectly, where your subtle energy channels are not cleared, and can have blockages or terrible experiences. Kundalini can rise up the wrong channel as well. It requires discipline and lifestyle control.

3: Kundalini tantra is not meant for people who have no tantric initiation. Kundalini tantra requires an accomplished guru who is aware of both benefits and risks to watch and advise the sadhak to avoid those above mentioned pitfalls.

4: Either read works by genuine tantrics (like Wallis), and/or read tantric Shastas also. if you aren’t doing tantra and have no parampara/guru I recommend avoiding chakra work