Given the size of the engine, there is no room for weapons bays.
Therefore, munitions would have to be carried externally, destroying the stealth signature.
The UAV could be used for high altitude ISR.
It looks like they are dropping something here:
https://www.youtube.com/watch?v=3I0opI3fRH8
Dead man, no longer walking?
“Hezbollah has lost contact with possible Nasrallah successor, source says”
“Hezbollah has lost contact with a possible successor to its late leader Hassan Nasrallah, according to a Lebanese security source.
The group has not heard from Hashem Safieddine since an Israeli strike in Beirut’s southern suburbs targeted him on Friday, the source told CNN Saturday.
Some background: Safieddine served as head of Hezbollah’s executive council and, until his predecessor’s death, was seen as one of the most likely heirs to the organization’s highest-ranking seat.
He is a maternal cousin of Nasrallah, and studied alongside him in Iran in the 1980s.”
Like the SU-57, the exposed seams and fasteners likely indicate it's not particularly stealthy compared to western standards.