If rubbing shoulders with your colleagues in the fleshperson provides real pleasure, it is also beneficial on thea professional level.

In the flesh feels a little odd here. It's hard to explain. In person is best.

ThisOur newspaper moved its offices this summer.

And in undowhile unpacking boxes, I had two questions in mind: will we again use these dozens of staplers and hundreds of shirts that we kept?

This second reflection is at the heart of a questioning that currently occupies labor specialists around the world.

For more than a year, we were forced to experiment with what many had been demanding for years.

However, I see an obstacle on the road to this hypothetical future: that of the pleasure of meeting, «for real», our comrades in arms.

If you don't have access to italics or bolding, it can be hard to decide what to use instead. We never use the « symbol in English, but you can use " or , instead.

Feeling part of athe gang.

A gang = street gangs, the gang = friends

The indirect transmission of information and experience, which is often done at lunchtime or in corridorpassing conversations, is difficult to recreate remotely.

Or "in conversations in corridors"

Digital industry bonzeprofessionals have every advantage in claiming that their tools make physical offices obsolete.

I've never heard of bonzes, and although I looked it up I am unsure how you are trying to use it here. I think a better word is professionals? But I am unsure.

But it is not impossible that the pleasure we will have to find our collar

I don't know the meaning of this sentence so I can't correct it. The ending is very unclear.

If rubbing shoulders with your colleagues in the flesh provides reis beneficial on a social or emotional pleasurevel, it is also beneficial on the professional level.

"provides real pleasure" is a bit weird.

This newspaper moved its offices this summer.

"The newspaper company I work at"?

And in undowhile unloading boxes, I had two questions in mind: will we use again use these dozens of staplers and hundreds of shirts that we kept?

"two questions came to mind" might work better depending on the precise effect you are going for.
"will we use again these dozens of staplers and hundreds of shirts that we kept" is still a bit stiff, just because we rarely use "again" in that position in modern colloquial English. Rephasing as something like "will we ever use these dozens of staplers and hundreds of shirts again, or did we just keep them for no reason?" may be better if this is meant to be more casual.

This second reflection is at the heart of a questioning that currently occupies the minds of labor specialists around the world.

For more than a year, we were forced to experiment with what many had been demanding for years.

Feeling part ofa sense of belonging to a gang.

"Feeling part" is not a valid construction; "feeling like [you are a] part of a" might work.
"gang" in English often has a negative connotation (e.g. drug gangs).

The indirect transmission of information and experience, which is often done atover lunchtime or in corridor conversationsthe hallway, is difficult to recreate remotely.

Digital industry bonzes have every advantage in claiming that their tools make physical offices obsolete.

"bonze"?

But it is not impossible that the pleasure we will have to find our collar

?