My archieve page is having issue

Hi there,

What's the issue? The excerpt is showing or excerpt is not showing?

the excerpt should not be shown but my two post's excerpt is showing on this https://www.masteryblogging.com/blogging/page/2/

Those 2 posts are using post format gallery while the others are using standard.

how to fix this

You can just select standard instead of gallery. It's a WordPress option:
https://www.wpbeginner.com/glossary/post-formats/