is there a way to embed node labels inside a node and space out nodes more?

[StarScream2010]

I'm using the collapsibletree package to create a tree diagram as below. However, as you can see, the node names are rather untidy. Is there a way to embed the node names inside the coloured nodes (rather than adjacent to them, as pictured?) and alter the spacing between node levels (some of the names cut into previous nodes!). I'm open to using alternative r packages too.

Thanks

For reference, here's the code used to produce it

collapsibleTree(
  Geography_Data,
  hierarchy = c("continent", "type", "country"),
  width = 800,
  zoomable = FALSE
)

[SyMM1]

also is it possible to add number of nodes within the circle? @AdeelK93

[SyMM1]

For the past few days i have been trying to recreate this tree https://bl.ocks.org/mbhall88/126b3c2c54215b4d1ffbd2d778ce3973#data.tsv . It is similar to collapsible tree. Can you please help me in placing number of nodes within the circle @AdeelK93

[doming50]

For the past few days i have been trying to recreate this tree https://bl.ocks.org/mbhall88/126b3c2c54215b4d1ffbd2d778ce3973#data.tsv . It is similar to collapsible tree. Can you please help me in placing number of nodes within the circle @AdeelK93

@SyMM1 were you able to recreate it?