It is the same error about sdks not found? As wagner says, if you can provide us the logs so we can see what is failing that would help. FlexCel and biz installers were developed independently by different people, so if both fail to find the linux SDKs, there should be something likely wrong with the installation of the command line tools, even if delphi allows you to compile from the IDE.
The popup is to warn you that you likely don't have android support in Delphi, so you don't lose time trying to install. But if you think your installation is ok, you can ignore it, and see if it install successfully.
But note that this is about android 32 bit, which is almost dead today. Can you confirm that the android apps you can compile with delphi are android 32 and not android 64 bit? I don't think there is much android 32 left anywhere, and for sure any tablet or phone in at least 5 years are android64.
for what is worth, what the setup is checking (for android32, not 64) is:
That you have a "default_android" key in the registry at Computer\HKEY_CURRENT_USER\Software\Embarcadero\BDS\23.0\PlatformSDKs
It looks at Computer\HKEY_CURRENT_USER\Software\Embarcadero\BDS\23.0\PlatformSDKs<value of the key in point 1.>. In my case, the value of Default_Android is "AndroidSDK25.2.5_32bit.sdk", so it looks at Computer\HKEY_CURRENT_USER\Software\Embarcadero\BDS\23.0\PlatformSDKs\AndroidSDK25.2.5_32bit.sdk
Inside there, it looks at the value of the entry SDKZipAlignPath: