Hi With Tiktok Comments Scraper you can change the amount of comments that are going to be scraped by changing "Max comments per post" to your desired number, you can enter some big number like 999999 which would result in scraping every comment that there is but note that scraping more then 500 comments can be a bit slow.
Every comment should be scraped, excluding replies, but you can also scrape that by modyfing the "Max replies per comment" field in the Actors input.
TikTok Comments Scraper doesnt currently offer option to filter out different comment, you would have to do that on your own.
If you would have any other question specifically around this Actor i suggest you to create a ticket in the Actor's issues tab which you can find here:
https://console.apify.com/actors/BDec00yAmCm1QbMEI/issues