iOS drains battery 1%/minute

Hi there. I am very desperate because the 2d app I’m working on is draining waaaaays to much battery on iOS. On Android it is only half(4% in 10 min). The both have mainly the same Code. Does anyone have an idea what to do? My app uses Physics 2d, some lighting (which is off by Default low graphics mode, msaa2 90% render Resolution, mobile hdr on (for Bloom effect). Anyone any idea? I’m optimizing the hell out of it but it just does not want to drain less. Test device is mainly iPhone 8 but older devices too