Without having looked at this particular chip, most FM radio ICs will be set default to take 200kHz steps.
They won’t be set to an even frequency by tuning to something like 104.4 MHz, even if you tell them to
because radio stations in most countries, by law, must be at least 200kHz apart.
You can set the frequency step to 100kHz, or 50kHz though, and then this will work.
A specific example of this is the Silicon Labs Si4703/Si4702.
For these chips the step register is called "SPACE”.
You can change this because in different countries, the laws and channel spacing are different.
200kHz spacing applies to the US and Australia, For Europe you might find 100 kHz spacing,
and 50kHz in parts of Japan.
You might also notice AM radios with digital displays take 9kHz steps for the same reason.