Tokyo Ghoul:re does follow the manga pretty closely. However, there are a few alterations here and there, especially in terms of pacing and visual presentation. But the essence and key elements of the manga are well-preserved.
It follows it to a certain extent. There are some differences, but the main plot and characters are mostly consistent.
Overall, Tokyo Ghoul:re has a decent adherence to the manga. Some details and scenes might be tweaked for the adaptation, but the core story remains intact. The changes made are usually to make it more suitable for the anime format.