When you are viewing a tweet, you should be able to click on the 3 dots (...) and then it will give you an option to Embed Tweet. Then just copy all of that code that comes up and paste it right into a post.
<blockquote class="twitter-tweet"><p lang="en" dir="ltr">Brady finds the rookie Tyler Johnson for his first career NFL TD <br><br>Bucs up 21-10 on the Packers<br><br>(via <a href="https://twitter.com/NFL?ref_src=twsrc^tfw">@NFL</a>) <a href="https://t.co/vKEo7lbZNp">pic.twitter.com/vKEo7lbZNp</a></p>— B/R Gridiron (@brgridiron) <a href="">October 18, 2020</a></blockquote> <script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>