I saw a video of Ibn Uthaymeen saying claiming Yusuf had a child with Maryam is kufr. I thought it was kufr but waited for the sheikhs words to be certain. I read that someone who hesitates calling something kufr is a kafir from scholars like sheikh Fawzan but I also fear mislabeling.Was this kufr

Ustadh AbdulAziz al-Haqqan

No this is waswas. And Allah doesn't burden you with what you have no knowledge of