Translate proj4string into WKT using R

Question

I'm relatively new to displaying geographic data outside of ArcGIS, and I just inherited an R Shiny app that sets a coordinate reference system using a proj4string, which I learned is now obsolete.

Previously, the app used this command: dat$myCRS <- sp::CRS("+proj=lcc +lat_1=44.299999 +lat_2=44.99999 +lat_0=44.300003 +lon_0=-114.7 +x_0=0 +y_0=0 +units=m +datum=WGS84 +no_defs +type=crs"). I think this is the part that's now obsolete, and I'm unsure how to convert that proj4string to a WKT, either by specifying an EPSG code (such as in this page), or by building a WKT by hand. I also found this question, and it appears to be similar but the reverse of what I'm trying to do?

Thanks!