Blur to CSS

Do you have a link to the code for inspection?

Yep. Use it:
position: absolute;
width: 80px;
height: 80px;
right: 0px;
bottom: 0px;
background: rgba(21, 27, 30, 0.25);
filter: blur(80px);
backdrop-filter: blur(16px);

Figma promises that such an element will create a soft and smooth blur and darkening of the background that is under it. The browser creates a hard lens with sharp edges.

Sorry Vladimir I didn’t see this earlier, will take a look later if I get time.

Can you help me? I have been looking for a solution for several months

you can blur background in css by using following code pro zone

background: rgba(255,255,255,0.5);
backdrop-filter: blur(5px);