If all you want is reshaping, then what I need to see is examples of the two initial data objects and final combined object. You will need to make at least the combined object manually. In the very simple example below, I have made three objects manually to show the kind of thing I am looking for. I am sure your data are more complex and you may want to use some of the R functions available for posting data. I have included a link at the bottom of the post that may help. If your combined object is large, you do not need to show it entirely. I just need enough to understand how the pieces of the initial objects fit in the final object. If your objects are not data frames or tibbles, you need to tell me what kind of objects they are. You can see this using the class() function.
#the first object
FirstData <- data.frame(A = c("A", "B", "C", "D"), B = c(1,2,3,4))
FirstData
#> A B
#> 1 A 1
#> 2 B 2
#> 3 C 3
#> 4 D 4
#the second object
SecondData <- data.frame(alpha = c(0.2, 0.1, 0.3, 0.15), beta = c(3,2,1, 6))
SecondData
#> alpha beta
#> 1 0.20 3
#> 2 0.10 2
#> 3 0.30 1
#> 4 0.15 6
#the combined object
CombindedData <- data.frame(A = c("A", "B", "C", "D"), B = c(1,2,3,4),
alpha = c(0.2, 0.1, 0.3, 0.15), beta = c(3,2,1, 6))
CombindedData
#> A B alpha beta
#> 1 A 1 0.20 3
#> 2 B 2 0.10 2
#> 3 C 3 0.30 1
#> 4 D 4 0.15 6
Created on 2020-05-18 by the reprex package (v0.3.0)