I also have this same problem, on my system with an old AMD Radeon GPU with 4 GB of GPU VRAM, epic launcher always uses ~2GB when running. I have also seen this behavior on a Nvidia (Ampere gen) laptop GPU (also ~2GB used out of 4GB VRAM), though not on all program launcher.
This roughly started around a month ago, before that EGL used the “normal” 0.1-0.3GB amount that chromium/CEF/webview/etc usually uses on VRAM (i.e. the same as every other “modern” program).
Sometimes it is possible to make Windows swap out the memory to system RAM, making the launcher use an extra ~2GB of CPU RAM instead (and eventually swapped out to the on-disk pagefile). Meaning that games can finally actually use the whole amount of VRAM.