Hide "Panel" row from rbinded modelsummary tables

Consider the following MWE:

mod <- lm(mpg~factor(cyl)*disp, mtcars)
fin1 <- marginaleffects::hypotheses(
  mod,
  "`factor(cyl)6`+`factor(cyl)6:disp`=0"
)
fin2 <- marginaleffects::hypotheses(
  mod,
  "`factor(cyl)8`+`factor(cyl)8:disp`=0"
)
fins <- list(fin1, fin2)
modelsummary::modelsummary(fins, stars=TRUE, gof_omit=".*", shape="rbind")

Which results in:

How can I hide the "Panel" rows?

Haven't found an option to achieve this in the docs. But one option to achieve your desired result would be to manipulate the table object returned by modelsummary like so, i.e.

• we can remove the group rows using tab@lazy_group <- list()
• fix the styling using tinytable::style_tt

library(tinytable)
library(modelsummary)

mod <- lm(mpg ~ factor(cyl) * disp, mtcars)
fin1 <- marginaleffects::hypotheses(
  mod,
  "`factor(cyl)6`+`factor(cyl)6:disp`=0"
)
fin2 <- marginaleffects::hypotheses(
  mod,
  "`factor(cyl)8`+`factor(cyl)8:disp`=0"
)
fins <- list(fin1, fin2)
tab <- modelsummary::modelsummary(
  fins,
  stars = TRUE, gof_omit = ".*",
  shape = "rbind"
)
# Remove group rows
tab@lazy_group <- list()
tab |>
  # Set indent to 0 on first column
  tinytable::style_tt(
    j = 1,
    indent = 0
  ) |>
  # Add separator line
  tinytable::style_tt(
    i = 4, line = "b",
    line_color = "lightgrey", line_width = 0.05
  )