In their own handbook, the LDS church admits that a funeral service is a tool for missionary work, and there should be limitations to time spent giving tributes.

“Funerals provide an important opportunity to teach the gospel and testify of the plan of salvation. They also provide an opportunity to pay tribute to the deceased. However, such tributes should not dominate a funeral service. Having large numbers of people share tributes or memories can make a funeral too long and may be inappropriate for a church service.”

Handbook 2 – Administering the Church (Salt Lake City, UT: The Church of Jesus Christ of Latter-day Saints, 2019 edition), 18.6.4.