AGVEE 6.6ft Dual DAC 32Bit/384kHZ USB C to RCA Audio Cable, Type C to 2RCA Y Splitter Cord for iPhone 16 15 iPad Pro Samsung Galaxy S24 S23 S22 S21, Google Pixel Series, Amplifiers, Black

I just lined in to my cassette deck through the RCA jacks.I used this cable from my iPhone to the deck. https://www.amazon.com/dp/B0DK74J18PIf your phone has a standard 3.5mm jack out look for that cable. 3.5mm to RCAEasyTurn your phone volume up to about 80% and adjust your cassette levels accordingly.

I’ve used a cable like this to go from my phone to my cassette deck.Hope this helps.USB-C to RCAhttps://www.amazon.com/dp/B0DK74J18PThere are other cables available that adapt headphone jack to rca also