Photos app: Edited HDR photos appear dark on non-XDR displays

I use a Macbook Pro (XDR) to import HDR pictures (HEIF format HDR PQ pictures) from my Canon R6 MK2 camera. If I do not edit the picture, it looks good on all devices including iPad and Apple TV with no HDR/XDR, but SDR displays. But unfortunately the moment I edit the exposure or other values within Photos app either on MacBook or iPhone, the edited photos still look good on XDR displays (MB, iPhone), but looks very dark on the iPad and ATV without XDR displays. Only photos edited on Apple os 27 are affected. All devices on 27.2. Can someone please help?