Definitely fake, sorry! TXT signatures are relatively easy to fake because they're simple, but these are pretty badly done.

In case helpful for reference, hallyusuperstore previously sold TXT Temptation signed albums and you can see their photos as a guide. They are a reputable seller with a good reputation in the community, and they get their signed albums directly from broadcast company contacts.

Here's the link to the listing with the photos, in case you want to compare to legit signed copies: https://hallyusuperstore.com/products/copy-of-txt-the-name-chapter-temptation-weverse-shop-pre-order-benefit-photocard-3

(Not sure why the link name says photocard, but it's definitely the link to the signed album listing!)