Text Blocks to support in modules?

TinyMCE strips out <script> tags from HTML Blocks, so Text Blocks were added to Page Builder to support <script> on custom pages. However, Text Blocks aren't available in modules (e.g., Events) which support only TinyMCE text editor. TinyMCE can be disabled, of course, but this is a limited all-or-nothing approach for customers who need a friendly editor.

Can Text Blocks (or something similar) can be added to modules to support <scripts> without disabling TinyMCE completely, like for custom pages?

There is "Text Block" in Pages Builder which is the same as "HTML Block" but without TinyMCE, so you can type raw HTML code there.

Understood, but Text Blocks aren't available in modules (e.g., Events) which support only TinyMCE text editor.

Can something like Text Blocks can be added to modules to support <script> elements on these pages?

It's not safe to allow post JavaScript for regular members, even if you enable it somehow on user-side in TinyMCE then it will be stripped on server side anyway. So only admin is allowed to post JavaScript in special blocks.