Is this Samsung battery usage indicator broken?

idk if this site is right place place to ask the question, but i do not know how this **"samsung battery usage indicator"** works. You can see from last charge(95%) it used 78% till now, and currently its (95-78) =17%. But if you add up the battry usage of individual apps given on bottom right i.e 25.6%+ 0.7% + 0.7% + 0.7% + 0.6% = **28.3%**. Why it doesn't add up to 78%? Its far less than that, even considering minimal background usage of system apps it would never reach 78%. Where is most of my battery usage lost? The Device is Samsung M55 8gb variant. Specifications- https://www.google.com/amp/s/m.gsmarena.com/samsung_galaxy_m55-ampp-12896.php