This is a conditional yes, not a blanket approval for every quartz brand. Mrs. Meyer's says its Multi-Surface Everyday Cleaner is safe on most sealed stone and directs users to spray and wipe non-porous surfaces including countertops; your quartz manufacturer's care instructions still take priority.
Product evidence
Mrs. Meyer's says the Multi-Surface Everyday Cleaner is safe on most stone surfaces when sealed, does not recommend it on unsealed natural stone, and lists countertops and sealed stone among intended uses.
Mrs. Meyer's — Multi-Surface Everyday Cleaner ↗Quartz-care context
Quartz care varies by manufacturer. Cambria, for example, recommends warm water, a soft cloth and mild soap for routine care, and warns against harsh or abrasive products that can alter the finish.
Cambria — Quartz Product Care ↗What the condition actually means
The product guidance is broad rather than quartz-brand-specific. That is enough for a compatibility signal, but not enough to override a countertop maker's exclusions. The main uncertainty is the finish and the care policy for the specific engineered-stone surface in front of you.
If you already used it
If the surface looks normal, wipe away any remaining cleaner and dry it with a soft cloth. There is no reason to treat a single normal use as damage by itself; the useful next step is simply to check the care guide for your quartz brand before making it a routine cleaner.
Safer approach
For the lowest-risk routine, follow the quartz manufacturer's care guide. Warm water, a soft cloth and a mild cleaner are the conservative baseline for many engineered-quartz surfaces.