Study of NX-5948 in Combination With Other Agents in Adults With B-cell Malignancies

Bexobrutideg is an investigational drug designed to target a protein called Bruton tyrosine kinase (BTK), which helps cancer cells grow in certain blood cancers like CLL and SLL. Bexobrutideg is a protein degrader, which means it finds and destroys the BTK in the cell. Venetoclax, rituximab, and obinutuzumab are approved medications that are used to treat CLL/SLL. The study will look at: * How safe bexobrutideg is for patients with CLL or SLL when taken with these other treatments * The effects of bexobrutideg in the body when taken with these other treatments * How well bexobrutideg treats CLL or SLL when taken with these other treatments