A native static caret is implemented in, for example, all Boox products, HiSense e-ink products, the Light Phone, the YotaPhone, the Kyocera Docomo KY-01L. There is a native option for it in Android 16 as well as iOS ≥ 18. It has recently been implemented in CSS. I do not own a Kompakt, so if this feature is in fact implemented in KompaktOS, please forgive me, but it does not seem to me to be the case, and the reason I do not own one is at least partly due to this.
A static caret is non-distracting, as well as energy-saving on e-ink screens.
Thank you for your attention.