Watching a pdf render from org-mode generated tex files is an exercise in futility. A simple watchexec command with a notifier is much nicer.

 1watchexec \
 2  -e tex -e bib \
 3  -- \
 4  sh -c '
 5    # Main source file – change this if you compile a different document.
 6    src="rgDraft_I.tex"
 7    pdf="${src%.tex}.pdf"
 8
 9    # Run Tectonic with shell‑escape enabled.
10    if tectonic -X compile -Z shell-escape "$src"; then
11      notify-send \
12        -u normal \
13        -i document-save \
14        "✅  TeX compiled" \
15        "$pdf ready"
16    else
17      notify-send \
18        -u critical \
19        -i document-save-as \
20        "❌  TeX compilation failed" \
21        "Check terminal for error messages"
22    fi
23  '

Could become a more full fleged script later.