Not getting ggplot2 aesthetics completions if assigning to an object

[olivroy]

System details

RStudio Edition : Desktop [Open Source]
RStudio Version : 2024.4.0.693
OS Version      : Windows 10 x64 (build 19044)
R Version       : R version 4.3.2 (2023-10-31 ucrt)

Steps to reproduce the problem

# Try to get completion for ggplot2 aesthetics with the script
library(ggplot2)
y <- ggplot(mtcars, aes(<TAB>))

Describe the problem in detail

Nothing shows.

Describe the behavior you expected

I would expect the same completions as if I tried to complete from this script

 ggplot(mtcars, aes(<TAB>))

Relates to #14399
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