I cannot find support for the application for PV installations and energy storage from Huawei - FusionSolar.
Thank you for your help.
1: GitHub - wlcrs/huawei_solar: Home Assistant integration for Huawei Solar inverters via Modbus Modbus connection needed! Not for beginners, but the Wiki is good.
2: GitHub - tijsverkoyen/HomeAssistant-FusionSolar: Integrate FusionSolar into your Home Assistant. Available over HACS
While you are right that there is no native integration to find on the native system, a simple google search can often help you 