lightning to 3.5mm stereo adapter

Well, this is a user-to-user site. We are all users here....just like you. Apple is not here and this is not a chat service.

Volunteers answer questions. You won't get an instant answer unless another volunteer happens to see your post appear. It's normal to expect an answer within a few hours, but it all depends on the number of volunteers who happen to be working for free at the time.

I normally buy Apple products from Best Buy because their store is 5 minutes away.

Best Buy has the Apple adapter in their stores and also available online.

https://www.bestbuy.com/site/apple-lightning-to-3-5mm-headphone-adapter-white/5622278.p?skuId=5622278&utm_source=feed&ref=212&loc=20265459052&gad_source=1&gclid=EAIaIQobChMIrsf50uCjgwMVuy7UAR3xKwDhEAQYBCABEgJyV_D_BwE&gclsrc=aw.ds

Although I did not check at the local Apple Store here, Apple offers the same adapter online.....Charging Essentials - iPhone Accessories - Apple

Scroll down 3-4 rows to find the adapter. Might be more or less rows depending on your monitor or screen.

Belken makes a variety of adapters. You might want to try their website.