This will install Apple SF & NY fonts on Linux. Tested on Pop!OS (similar to Ubuntu) 20.10.

install-apple-fonts.sh

#!/bin/bash

# Install Apple fonts on Linux
# requires p7zip-full installed

getFont() {
  NAME=$1
  APPLENAME=$2
  DIR=$3
  DIR=${DIR:="/tmp"}
  if [ ! -f  "${DIR}/${NAME}.dmg" ];then
    wget "https://devimages-cdn.apple.com/design/resources/download/${NAME}.dmg" -O "${DIR}/${NAME}.dmg"
  fi
  cd "${DIR}"
  7z x -ao "${NAME}.dmg"
  cd "${APPLENAME}"
  7z x -ao *.pkg
  7z x -ao Payload~
  cp Library/Fonts/*.otf Library/Fonts/*.ttf ~/.local/share/fonts
}


mkdir -p ~/.local/share/fonts
getFont SF-Pro SanFranciscoPro
getFont SF-Compact SanFranciscoCompact
getFont SF-Mono SFMonoFonts
getFont SF-Arabic SFArabicFonts
getFont NY NYFonts
fc-cache -f -v