See as a result of His Blood shed and consequently it washes those He died for from their sins, He makes, produces them into spiritual priests. The word made in Rev 1:6 is the word poieó and means:

to make, do
Usage: (a) I make, manufacture, construct, (b) I do, act, cause.

with the names of the things made, to produce, construct, form, fashion,

to create, to produce: of God, as the author of all things, τί or τινα, Matthew 19:4; Mark 10:6; Luke 11:40; Hebrews 1:2; Acts 4:24; Acts 7:50; Acts 17:24; Revelation 14:7

The death of Christ results in a new creation !