You read that right; everyone can seal.
In the earliest days of the Restoration, “sealing” essentially was giving a stamp of approval that endured after death. These sealings included prayers, baptisms, blessings, anointings, ordinations, contracts, and marriages were all “sealed” during this time, and the actual ritual involving sealing differed greatly as well.
At the end of October 1831 Joseph Smith taught that “The order of the High priesthood is that they have power given them to seal up the Saints unto eternal life. And said it was the privilege of every Elder present to be ordained to the High priesthood.” This power to seal is then confirmed in “The Lord’s Preface” when it says: “they who go forth bearing these tidings unto the inhabitants of the Earth to them is power given to seal both on Earth & in Heaven the unbelieving & rebellious”.
As Joseph Smith Jr. consolidated power, the ability to “seal” was increasingly restricted. However, if we are to accept these early teachings of the Restoration, then those who have the priesthood and preach to others hold this sealing power. If we are also to accept the teachings of modern prophets, such as “Official Declaration 2: To women currently or formerly members of the LDS faith” and “Official Declaration 3: To homosexuals currently or formerly members of the LDS faith“, everyone has this power to seal.
Additionally, while “sealing” came to be associated with plural marriage, I vastly prefer Orson Hyde’s understanding, particularly with the spin that Jaxon Washburn gave it in his 2023 post “A Diagram of the ‘Kindom’ of God”. I like the perspective that the sealing ritual is to indicate a connection so strong that the people want it to transcend lifetimes.
Considering the history of “sealing” I think a ritual to mark the commitment is appropriate, but even our own history shows that this ceremony can look quite differently and doesn’t requires a Temple. I personally prefer a sort of fused version of the Josephite marriage ritual, Strangite adoption ritual, and the Brighamite sealing ritual, which looks like this:
(Officiator asks the first) “(Sister/Sibling/Brother) , do you take (Sister/Sibling/Brother) by the right hand and receive (her/them/him) to be your (Marriage: wife/spouse/husband | parent-child: mother, parent, father | Sibling: sister, sibling, brother), for time and all eternity, with a covenant and promise that you will observe and keep all the laws, rites, and ordinances pertaining to this holy union; and this you do before the heavens and these witnesses, of your own free will and choice?”
(They then answer) “I do”
(The officiator then asks the other(s) the same.)
(After this the priesthood then announces, as water is sprinkled onto them) “By virtue of the holy priesthood, I pronounce you, ____ and ____, sealed for time and all eternity. May the heavens add their blessings and help you to fulfill your covenants from henceforth and forever. Amen.”