I bet the two sources won't agree on what values go into the denominator and / or numerator of their effective tax rate calculations. It can be as simple as the 3.5% being a calculated rate on revenue rather than profit
There is no real concept of sources legitimately disagreeing here. There is tax law, which Meta uses to calculate its tax liability, and then there are lies.
Even if you mistakenly calculate the rate on revenue, you will get 25474/200966=13%.
You can't just throw revenue in the denominator, though. Business tax is assessed on income. If you're going to make a claim about tax rate using an unconventional metric, you need to be explicit about what you've done; Reich isn't.