Middle of the road center-left poet, cultural critic and art journalists affiliated with PEN (an organization most well-known for its defense of free speech and the rights of imprisoned writers; have never encountered them being affiliated with color revolution agents or funders, U.S. state department etc., so I have always assumed them as innocuous). Why are you asking? Is PEN having a seminar or something in Bangladesh and they are speakers?
They signed a petition along with other prominent international activists demanding the release of a well known long time collaborator of the previous regime from BD government. I.e. Shahriar Kabir. Officially he is an ultra leftist human right activist, journalist and film maker. Unofficially, he run the propaganda machine for the previous regime justifying and whitewashing its brutality. I mean the guy founded a committee named 'Committee for eliminating Killers and traitors of Bangladesh Liberation War'. You can already see how absurdly loaded it is. It was basically a politically motivated witch-hunt after 50 the years of the independence justifying the judicial killing of previous regime's opposition. (Remember when in mid 2010s BD-Türkiye relation got tense due to those executions of Muslim brotherhood affiliated leaders?) Besides, he is also involved in corruption receiving a good sum from the previous regime and rulling party.
The problem is, previous government wouldn't have given a fuck about such petition. But this one run by an international celebrity and a noble laureate is very much perceptive of these things. Also, it is working hard to improve the image of this government internationally and to give legitimacy to this revolution globally as people's revolution.
Yes, one could argue irregularities in his arrest process as he is been charged with murder cases of few protesters. Which unlikely to hold up in the court. As I told you before, the institutional set up is largely broken and will take time heal. However, everything above I said about him is true and more.
Also, it seems Tarık Günersel has co-founded a '21th century humanist' forum with Shahriar Kabir previously. Which makes it worse.