What steps should I take when both L and R earphones are not paired initially?

Press and hold the multi-function keys of both earphones simultaneously for 6 seconds until they prompt ‘PAIRING’. Afterward, enable Bluetooth pairing on your phone with entries named “Airplus” to connect successfully.

From the official Tws Wireless Bluetooth Earbuds manual, page 2

Have a follow-up question?

Answers from the official manual.

Common questions