add_vline not rendering properly with secondary y-axis

Hello,

I encountered a problem, when using add_vline with a secondary y-axis and no data on it.

plotly.py version: 5.5.0

Minimum example:

import plotly.graph_objects as go
from plotly.subplots import make_subplots

fig = make_subplots(
    specs=[[{"secondary_y": True}]],
)

# Uncomment the line below to "fix" the problem
# fig.add_trace(go.Scatter(x=[0, 1], y=[2, 3]), secondary_y=False)
fig.add_trace(go.Scatter(x=[4, 5], y=[6, 10]), secondary_y=True)
# Change secondary_y to True to also "fix" the problem
fig.add_vline(4.5, exclude_empty_subplots=False, secondary_y=False)

Expected behavior:
The add_vline should a vertical line to the plot no matter if it has traces or not. How the plot looks like, when following the second comment.

Best regards
Julian

Start by running the minimum example in the issue with plotly.py 5.5.0 and inspect the add_vline behavior when the primary axis has no data. Compare the result with the commented trace and secondary_y=True cases; done means the vertical line renders on the requested axis even when that axis has no traces.