Checking the fill level of a liquid gas tank (Remote Control Technology GmbH (RCT) , web API available)

[Borilu]

What kind of device or service would you like to see an adapter for?
Company name: Remote Control Technology GmbH (RCT)
Website: https://r-c-t.biz/
Device: "LEVELview.BASIC.LPG" together with "LEVELview.WLAN" = "LEVELview.ADVANCED"
LEVELview.BASIC.LPG: https://r-c-t.biz/fileadmin/user_upload/dokumente/produkte/RCT-Datenblatt_LPG_BASIC_D_web.pdf
LEVELview.WLAN: https://r-c-t.biz/fileadmin/user_upload/RCT_Datenblatt_LEVELview_WLAN_D_01_2023.pdf

Is the device connected to the internet or only available on a local network?
Together with "LEVELview.WLAN" it is connected to the internet.

Is an official App or Website available?
Yes.
Web-App: https://app.rctmonitor.com/dashboard/home
AppStore: https://apps.apple.com/us/app/rct-monitor/id1491957704
PlayStore: https://play.google.com/store/apps/details?id=dec.rctmonitor.rct

Is an official API including documentation available?
Yes: https://app.rctmonitor.com/backend/swagger/index.html

Are other libraries for an integration available?
no

Is this device already integrated in other Smart Home systems?
no

Is this device already integrated in homebridge? Might the ham adapter in combination with the homebridge plugin be sufficient?
no

Additional context
A screenshot from the Web-App is attached to this comment.

Topic on the iobroker forum:
https://forum.iobroker.net/topic/71945/f%C3%BCllstand-eines-gastanks-abfragen