Can I limit the number of lines or words or tags to social media?

Yes, this is possible in the premium/premium plus plugin.

We can apply the limits to lines or words in {POST_TITLE}, {POST_EXCERPT}, {POST_CONTENT}, and {POST_TAGS}.

We can apply the limit as follows.

If we want to publish only 2 lines in the post content to social media, please use the format {POST_CONTENT:L-2}.

To publish 10 words of the post title to social media use the format {POST_TITLE:W-10}

To publish 3 tags from the post tags we can use the format {POST_TAGS:3}