Yes, there are several settings you can adjust on your iPhone to reduce 5G battery drain:
* 5G Auto: iPhones (12 and later, and iPhone SE 3rd generation) have a Smart Data mode called 5G Auto, which automatically switches to LTE when 5G speeds don't offer a noticeably better experience, thus saving battery life[4][9]. To enable it, go to Settings > Cellular > Cellular Data Options > Voice & Data, and tap 5G Auto[4][9].
* Turn off 5G when not needed: If 5G coverage is poor in your area, your iPhone battery may drain faster[2]. In such cases, it is advisable to disable 5G if you don't need it[2].
* Wi-Fi over Cellular: When using apps that require internet connectivity, using Wi-Fi consumes less battery power than cellular networks[4][9]. Ensure Wi-Fi is turned on and connect to a Wi-Fi network whenever possible[4][9].
* Airplane Mode: If you are in an area with no coverage for an extended period, enable Airplane Mode[4][6].
Citations:
[1] https://www.zdnet.com/article/i-improved-my-iphones-battery-life-by-changing-these-10-settings/
[2] https://www.youtube.com/watch?v=w61L59SV0rs
[3] https://www.ipitaka.com/blogs/news/30-fixes-to-instantly-stop-your-iphone-battery-draining-fast
[4] https://support.apple.com/en-jo/120745
[5] https://www.asurion.com/connect/tech-tips/improve-iphone-battery-life/
[6] https://www.pcmag.com/how-to/how-to-save-battery-life-on-your-iphone
[7] https://www.youtube.com/watch?v=HstRaQuHZUU
[8] https://www.youtube.com/watch?v=JnhwMjCG2sQ
[9] https://support.apple.com/en-us/120745