Transfer of Mutual Funds from other brokers to FYERS is similar to the Transfer of Shares. You can request for a DIS from the other broker (It'll be sent to your Email/Address), mention the units you wish to transfer. Attach the CMR of your FYERS Demat (It'll be in the Welcome mail when you'd opened the account in FYERS) along with the duly filled DIS and send it to the other broker. The said Mutual Funds will be transferred to your FYERS Demat based on the timeline given by the other broker (Generally, 24-48 hours).
Note: The Transfer procedure may differ from Broker to Broker. Kindly check with the other broker, just in case.
Hope this helps :)