That doesn't in the slightest mean the Bible permits abortion, but it does mean the Bible views abortion different than murder.
The text in question deals with either manslaughter (accidental death) or premature birth. Both are distinguishable from murder, the deliberate taking of a life.
And this is why the punishment is not capital.
And look at the next verse 23 - if they kill the mother they are judged as a capital crime.
The Bible does not consider a fetus a full person, but despite that it does not permit abortion.
On a practical level Judaism takes a middle of the road approach and [sometimes] permits abortion before 40 days from conception (or 57 days as is more commonly measured, from LMP).
The fine imposed for either manslaughter or premature birth indicates the Bible values an unborn's life to some extent. But the text doesn't prescribe punishment for deliberate killing of the unborn child. One would presume the punishment would no longer be a fine. (Indeed, the following verses suggest that if a life is taken, the punishment is capital.)
Your statement about Judaism's view of abortion is misleading. Judaism generally forbids it, and allows for it in only certain extreme cases, such as to preserve the life of the mother.[0]
[0]: https://judaism.stackexchange.com/questions/39015/is-a-jew-p...
How much more so someone who deliberately kills an unborn child?
The early Christian communities also forbade abortion based on the Biblical idea of preservation of life. The Didache, an early Christian writing circa 70-100 AD, forbids abortion[0]:
> "Do no murder children through abortion nor kill them after they have been born."
And this should not be surprising, as Christianity was birthed from Judaism, and Judaism forbids abortion in all but extreme cases.[1]
[0]: https://blog.judahgabriel.com/2022/07/what-did-early-christi...
[1]: https://judaism.stackexchange.com/questions/39015/is-a-jew-p...