Alternative theory - When the iOS application was discontinued and they had removed it from the app store in October, they redirected their support site to just the android version FAQ's and have forgotten to switch it back.
As a further note, Microsoft support is centralised at support.microsoft.com and it appears that they are currently adding all these help topics there too:
Not directly, other than their Facebook where people are giving feedback.
As an aside, I suspect these bing-related features are the only reason the product was brought back from the dead. Looks like Microsoft are adding features to allow you to help author text supported by GPT (e.g. change the tone of the message, rewrite portions from the keyboard etc)
Thus iOS support is just at:
https://support.swiftkey.com/hc/en-us/categories/200371942-i...
As a further note, Microsoft support is centralised at support.microsoft.com and it appears that they are currently adding all these help topics there too:
https://support.microsoft.com/en-au/swiftkey
IMO this falls into "don't attribute to malice that which is adequately explained by stupidity"