bxl-forever
I am afraid this requires to investigate a bit further.

There are plans to remove all railway crossings in Brussels in the next years, to improve road safety.

To the best of our knowledge the cycle tunnel here is not completed, and far from it.  We have recent Mapillary coverage here that shows no signs of works to build it.

I bet the note was set as a question, hence I restored the crossing.

Perhaps some confusion with other crossings, namely https://www.openstreetmap.org/way/859393730 (I surveyed it recently, the works were visible for a long time before it opened) or this: https://www.openstreetmap.org/way/498912471 (this is the one referred to in the Nieuwsblad article)?