x-drupal-dynamic-cache: UNCACHEABLE

You need to trace cache metadata that come from the rendered view. Twig Tweak itself doesn't add any cache metadata in this case.

1.
To solve this
 

{{ drupal_view('myview', 'block_1') }}

I found that one views field with aggregated option breaks cache metadata. I remove it and now it works.

2.
I solve this issue:

{{ drupal_entity('webform', 'myform') }}

by adding lazyload to webform block (or you can install last version of webform).