I searched for Ephesians 6:24 many translations to English and Spanish of the Bible. None say "Written from Rome unto the Ephesians by Tychicus." besides KJV (which, by the way, has been criticized extensivelyuses older manuscripts) Young's Literal translation also does not include it. It would be good to check if that verse is supported by manuscript evidence.
Although the epistle starts by mentioning Paul as the author in all translations, including the one you originally quoted:
Paul, an apostle of Jesus Christ by the will of God, to the saints which are at Ephesus, and to the faithful in Christ Jesus: grace be to you, and peace, from God our Father, and from the Lord Jesus Christ. https://www.bible.com/bible/1/EPH.1.KJV
as you said in your question, Paul's authorship of Ephesians has been disputed since at least the 18th century (or even as early as the 15th) due to many reasons. Among them, different theological emphasis and different stylistic and linguistic choices from other texts written by Paul (this, and more, is covered in the original question you cited).
Despite all that, none of those arguments are definitive proof that Paul did not write the letter. Also, as you may know, Ephesians is considered to be the culmination of Pauline theology.
A middle ground would be to consider this letter to have been originally written by Paul (possibly dictated and written by Tychicus) and then edited by other authors.
The authorship of the letter to the Ephesians has been widely debated from both sides of the argument and is covered extensively in the introduction of Ephesians: An Exegetical Commentary by Harold W. Hoehner. He covers most of the usual arguments against Paul's authorship and presents an opposition to them. The conclusion of that section reads:
The Pauline authorship of Ephesians not only has the earliest attestation of any book of the NT but this attestation continued until the last two centuries. The early attestation is highly significant. The early church was not only closer to the situation but also they were very astute in their judgement of genuine and fraudulent compositions. This overwhelming support of the Pauline authorship of Ephesians should not be easily dismissed.
In the course of this discussion, the various scholars and their views have been identified along with the many reasons given for rejecting Paul's authorship of Ephesians. Although Ephesians differs from other Pauline literature, the differences do not sufficiently argue for the refection of Pauline authorship of his letter. Variations can be accounted for due to differences in content and differences in the character and need of the recipients of the letter. Furthermore, it must be accepted that a genius such as Paul is not sterile in his expressions; allowances must be made for development in his own thinking. These elements are evident in his undisputed letters. Yet further, it is rather limiting to determine Paul's style and vocabulary based only on the writings that are canonical. If more of his writings were available, it would be easier to evaluate variances and consistency of vocabulary and style. Content, mood, and recipients affect the vocabulary and style of an author whether it be in the first or the present century. In fact, repeating the same content in identical or nearly identical circumstances would still produce variations in vocabulary, style and sentence length. Authors are not machines that duplicate vocabulary and style.
As I did, you may find this conclusion a little bit subjective, but if you read the whole section you will find a defense of Pauline authorship based on arguments.