The developer can put an option for hide : "more tweets"
I made a ublock origin filter for this. :
! More Tweets
twitter.com##[aria-label="Timeline: Conversation"] h2>div>span:has-text(/^More Tweets$/):upward([style^="transform"])
twitter.com##[aria-label="Timeline: Conversation"] h2>div>span:has-text(/^More Tweets$/):upward([style^="transform"])~div.
The developer can also put an option to disable “Show more replies,” button Thank you.