Seeking Recommendations for Reliable Email Design Software

Does anyone can suggest a software thats GOOD for email designs? We are currently using Emailify Plugin from Figma but we run into Dark Mode Issue and different visibility issues on email providers such gmail and apple. Sometimes it looks good on one and off on the other. As we scale, Emailify just keeps having more issues and thats really hard to track. highly appreciate any tips as we have 100+ emails..