One that worked for me is mycelium . It has multiple ways for exchanging crypto, one of them is a local personal market. (Balance > Buy/Sell bitcoin > Mycelium Marketplace)
But the rates are obviously worse than the regulated market, where you have to jump through hoops. But that is also in the app.
The only real option in this case would be to use an unregulated wallet through person-to-person exchanges which would inherently carry more risks than a normal regulated market. Not my area of expertise however so I'm not sure where you'd start, sorry.
Best bet will be to purchase Monero (XMR) anonymously, it's literally designed to be anonymous, then swap it into BTC. You'll then want a hard wallet to keep it secure until you have a reason to transfer it. Ledger is a decent option for a hard wallet, just be sure it's paid for in the XMR you bought anonymously or the BTC you swapped for XMR. NanoS is my recommendation for the specific wallet, but the tricky part will be getting it shipped to you anonymously as you CAN'T trust a used hard wallet.
Unfortunately you probably won't find any place to really buy it anonymously. If you have some crypto already you can buy some but without it, you will have to go through some broker.
In the US, know your customer is a big thing so you have to ID yourself before you can buy from the more legitimate companies.
Im no expert and Im not trying to protect crypto, but this is bullshit. Its a wild market and there is a lot of scam going around it. Its like saying ebay or aliexpress is absolutely a scam. Im owning crypto for 8 years and while I did experience a scam (nicehash), most of the experience was not like that. Was mining, trading, bought loads of appliances and computer components, withdrawals...
Dont have a good suggestion for OP tho, but maybe local forums have trade topics where you can find a seller and meet them in person. Its been much easier 5 years ago, but seems like almost everyone is asking for ID nowdays
This is absolutely not true. Are there scams? Sure. But there are plenty of legitimate businesses that use crypto. Take Proton, Kagi, Gratuitas, and Travala as just a few examples.