Alter text size on Home App

Apple's Home app is difficult to use for me. In all platforma macOS Venturea, IPadOS and IphoneOS it looks quite good except that I cannot read the information - like the temperatures as the text is too small. How do you increase the text size? ALso on macOS I cannot read all the headings as they are white on very light grey. I uise Dark Mode for macOS, I can use all the other Apple apps (e.g. ⌘+ and ⌘T so not a system issue. ⌘T pops up the usual font panel but does nothing to the app. This appears to be discriminated against people with less than perfect sight surely there must be a way around this.