Nope. This is a hard limit enforced by Webflow… Based on the its purpose it is generous.
An
altattribute’s value should clearly and concisely describe the image’s content. It should not describe the presence of the image itself, or the file name of the image. If thealtattribute is purposefully left off because the image has no textual equivalent, consider alternate methods for presenting the content the image is trying to communicate. -MDN