library(dplyr)
#> 
#> Attaching package: 'dplyr'
#> The following objects are masked from 'package:stats':
#> 
#>     filter, lag
#> The following objects are masked from 'package:base':
#> 
#>     intersect, setdiff, setequal, union
library(bcmaps)
#> Loading required package: sf
#> Linking to GEOS 3.11.0, GDAL 3.5.3, PROJ 9.1.0; sf_use_s2() is TRUE
#> Support for Spatial objects (`sp`) was removed in {bcmaps} v2.0.0. Please use `sf` objects with {bcmaps}.

tbl <- dplyr::tibble(
  a = "a",
  zone = 10,
  easting = 321123,
  northing = 5555555
)
tbl
#> # A tibble: 1 × 4
#>   a      zone easting northing
#>   <chr> <dbl>   <dbl>    <dbl>
#> 1 a        10  321123  5555555
class(tbl)
#> [1] "tbl_df"     "tbl"        "data.frame"

out <- utm_convert(tbl, "easting", "northing", "zone")

out
#> Simple feature collection with 1 feature and 6 fields
#> Geometry type: POINT
#> Dimension:     XY
#> Bounding box:  xmin: 1035564 ymin: 567840.9 xmax: 1035564 ymax: 567840.9
#> Projected CRS: NAD83 / BC Albers
#>    a zone       X        Y easting northing                 geometry
#> 10 a   10 1035564 567840.9  321123  5555555 POINT (1035564 567840.9)
class(out)
#> [1] "sf"         "data.frame"