There seems to be some kind of an issue with layer names and tmap
(v3) facets when changing SpatRaster layer order though subsetting. Here's a partial answer that might provide a workaround by first sorting by encoded dates so layers in the resulting SpatRaster would be ordered chronologically, presumably fixing facet order:
library(tidyverse) file_list <- c("RF_04.Apr.2022_LL", "RF_13.Dec.2021_LL", "RF_15.Feb.2022_LL", "RF_17.Dec.2020_LL", "RF_18.Nov.2021_LL", "RF_19.Feb.2021_LL") # extract dates, use file_list vector for names date_list <- file_list |> stringr::str_extract("(?<=_).*(?=_)") |> lubridate::dmy() |> setNames(file_list) date_list #> RF_04.Apr.2022_LL RF_13.Dec.2021_LL RF_15.Feb.2022_LL RF_17.Dec.2020_LL #> "2022-04-04" "2021-12-13" "2022-02-15" "2020-12-17" #> RF_18.Nov.2021_LL RF_19.Feb.2021_LL #> "2021-11-18" "2021-02-19" # sort by dates, extract names (file_list_sorted <- sort(date_list) |> names()) #> [1] "RF_17.Dec.2020_LL" "RF_19.Feb.2021_LL" "RF_18.Nov.2021_LL" #> [4] "RF_13.Dec.2021_LL" "RF_15.Feb.2022_LL" "RF_04.Apr.2022_LL" # import rasters x = rast(file_list_sorted) # alter names to only keep date values, part between _ & _ names(x) <- names(x) |> stringr::str_extract("(?<=_).*(?=_)") names(x) #> [1] "17.Dec.2020" "19.Feb.2021" "18.Nov.2021" "13.Dec.2021" "15.Feb.2022" "04.Apr.2022" # continue with tmap