You probably have a low end GPU, 2 GB cards aren't really as viable anymore. Performance depends more than just VRAM quantity. What specific card do you have and what games do you play? What about the rest of your system specs?
If your RAM utilization is generally over 85%ish then you'd notice an upgrade. RAM quantity itself wouldn't necessarily 'push more' FPS but you might 'drop less' frames by not having to swap and similar. For 2021 I feel like 16 GB is the minimum you'd want for a smooth experience.