What type of issue is this?

Missing compatibility data

What information was incorrect, unhelpful, or incomplete?

There isn't compatability data for the lengthAdjust attribute on textPath. On the textPath page, lengthAdjust isn't present in the compatibility data although it is included in the article itself. On the lengthAdjust page, it says it can be used with text, tspan, and textPath, but only text and tspan have compatability data.

What browsers does this problem apply to, if applicable?

No response

What did you expect to see?

Compatability data for lengthAdjust on the textPath page, and the same data for textPath on the lengthAdjust page. There's already an issue describing varying behavior in Safari iOS specifically for lengthAdjust on textPath elements, so it probably warrants having its own section on the textPath and lengthAdjust pages.

Did you test this? If so, how?

Missing compatability data

Can you link to any release notes, bugs, pull requests, or MDN pages related to this?

#27439 (comment) mentions the different behavior in Safari iOS.

https://developer.mozilla.org/en-US/docs/Web/SVG/Reference/Element/textPath#browser_compatibility doesn't have lengthAdjust.

https://developer.mozilla.org/en-US/docs/Web/SVG/Reference/Attribute/lengthAdjust#browser_compatibility doesn't have textPath.

Do you have anything more you want to share?

No response

MDN URL

https://developer.mozilla.org/en-US/docs/Web/SVG/Reference/Element/textPath

MDN metadata