Congratulations buddy, I know the feeling that comes with spending your Bitcoin without having to convert it to fiat first. I have done so on multiple occasions and it's more satisfying then spending fiats. Some might say it's an unwise decision spending Bitcoin but they forget Bitcoin is a currency and it's might to be spent not just held. You can have multiple accounts in which the Bitcoin in your sending wallet should be for spending while that in your investment account should be for holding.
If I may asked though, why the iphone, I get it's expensive and give a certain level of satisfaction but from my finding it isn't anything different from the iphone 12. Iphone aren't as innovative as we think, there aren't that much different. If you want a super phone go for the Samsung Galaxy S21 Ultra. Many people underate Samsung products but they deliver the best phone.
Yeah, I would like to congratulate OP for this achievement, I mean even in myself if I encounter to buy items on a store that really accepted bitcoin or cryptocurrency as a mode of payment I will be surely proud of it because this kind of instances is so rare. I mean, we are free to use wherever we wanted to use to spend our bitcoin and if I experience the same thing as OP have had experienced I would be glad about it because it only means that the small businesses in my country are also open on the possibility that crypto is now accepted by the people of my country.