2013 FAA allowed Bluetooth and wifi on flights[0]. Here's a recent article on the subject of what the major airlines will allow [1]. And a screenshot for doubters of me activating Bluetooth while in airplane-safe mode, which has been a feature of every modern phone me and my friends have [2].

[0] https://www.faa.gov/news/press_releases/news_story.cfm?newsI...

[1] https://traveltips.usatoday.com/rules-using-bluetooth-airpla...

[2] https://photos.app.goo.gl/riJejAkyxp9MRpsi7