A Study to Evaluate the Efficacy and Safety of Frexalimab, Brivekimig, or Rilzabrutinib in Participants Aged 16 to 75 Years With Primary Focal Segmental Glomerulosclerosis or Minimal Change Disease

Inclusion Criteria:

* Biopsy report indicative of primary FSGS or MCD, with supportive clinical presentation per Investigator's judgement.
* UPCR ≥3 g/g at screening, or ≥ 1.5 g/g in those with eGFR ≥ 60 mL/min/1.73 m2.
* eGFR ≥45 mL/min/1.73 m\^2 at screening.
* Documented history of UPCR or UACR (or 24-hour urine protein or 24-hour urine albumin) reduction by \>40% in response to corticosteroid or other immunosuppressive therapy when pre-treatment UPCR was ≥3.5 g/g or equivalent for UACR (or pre-treatment 24-hr urine protein was ≥3.5 g/day if 24-hour urine protein is used or equivalent for 24-hr urine albumin if 24-hour urine albumin is used).
* ≤10 mg/day prednisone or equivalent and stable starting at least 1 week prior to randomization.
* For those on a RAAS inhibitor prior to screening, the dose must be stable ≥4 weeks prior to screening; starting RAAS inhibitors or changing the dose will not be allowed during the double-blind or OLE treatment period.
* For those on an SGLT2 inhibitor prior to screening, the dose must be stable ≥4 weeks prior to screening; starting SGLT2 inhibitor treatment or changing the dose will not be allowed during the double-blind or OLE treatment periods.
* Body weight within 45 to 120 kg (inclusive) at screening.

Exclusion Criteria:

* Genetic or secondary FSGS or MCD. Those with APOL1 risk alleles are eligible.
* Collapsing variant of FSGS.
* ESKD requiring dialysis or transplantation.

The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.