5v to 12 Power Supply
A similar product appears to have a 12V, 2A output:
SEDNA - USB Type A 5v to 12V 2A DC DC Converter with 9 x 90 Degree Adapter Jack https://www.amazon.co.uk/dp/B07952G6KT/ref=cm_sw_r_cp_apa_i_EDrlFbDWTFCZ8
2A seems to be more than enough for your LEDs.
Would have commented but not enough reputation.