Can not use my custom font with plotly

I am trying to use a custom font with plotly but it does not work althoug it does work with ggplot. Is there a way to solve this?
You can download the font here: https://freefontsfamily.com/proxima-nova-font-family-free-download/

This is the ggplot example that does work:

library(dplyr)
library(ggplot2)
library(plotly)
library(showtext)
font.add("Proxima Nova", "ProximaNova.otf")


df <- data.frame(x = c(1,2,3), y = c(2,3,4))

my_theme_ggplot <-
    ggplot2::theme_bw() +
    ggplot2::theme(
      plot.title = element_text(hjust = 0.5),
      text=element_text(size=16,  family="Proxima Nova")
      )

p <- df %>% ggplot(aes(x = x, y = y)) + 
  geom_line() +
  ggtitle("Title", ) +
  labs(y= "Date", x = "Y Data") +
  my_theme_ggplot

p

This is the plotly example that does not work

df <- data.frame(x = c(1,2,3), y = c(2,3,4))
t <- list(
  family = "Proxima Nova",
  size = 14)

p <- df %>% ggplot(aes(x = x, y = y)) + 
  geom_line() +
  ggtitle("Title", ) +
  labs(y= "Date", x = "Y Data") 

ggplotly(p) %>% layout(font=t)

Reproduce the reported difference between the showtext/font.add setup in ggplot and the ggplotly(p) %>% layout(font=t) example. Start at the ggplotly and layout(font=t) entry points, and investigate how the custom family is passed to the rendered chart. Done means the Proxima Nova font renders in the Plotly output, with a regression check for the example if the project has a suitable test location.