If the NSA[1], GrapheneOS[2], and Apple[3] all believe that rebooting your mobile phone regularly is something that protects your data, you might consider doing it more often. Shortcuts on iOS make this super easy to setup.
2. https://grapheneos.social/@GrapheneOS/112204443465440601
3. https://www.404media.co/apple-quietly-introduced-iphone-reboot-code-which-is-locking-out-cops/