Why does `relayout!(p, template=...)` get overwritten by next `relayout!`?

Specific Domains Visualization
1

For the code

p = make_subplots(
    rows=2,
    cols=1,
    shared_xaxes=true,
)

add_trace!(p, scatter(y=1:2), row=1, col=1)
add_trace!(p, scatter(y=1:2), row=2, col=1)

relayout!(
    p,
    template="plotly_white",
)
relayout!(
    p,
    xaxis=attr(showlines=true, mirror=true, linewidth=2),
    yaxis=attr(showlines=true, mirror=true, linewidth=2, linecolor="red"),
)

I would have expected that the second relayout! updates the layout, but instead it seems to be reset. How can I prevent this?

(In Python one would first set the template default with

import plotly.io as pio

pio.templates.default = "plotly_white"

then this doesn’t seem to happen. Unfortunately I couldn’t find an equivalent command in Julia yet.)