\b and Indic word boundaries?

[Shriramana Sharma via Unicode]

Hello. Yesterday I reported https://bugs.python.org/issue32198 but
then was pointed to already existing
https://bugs.python.org/issue1693050 and friends.

>From reading these I came to find \b under
https://unicode.org/reports/tr18/#Compatibility_Properties.

I confess I don't entirely grok all the intricacies. So my question:
isn't \b the Unicode-recommended way of identifying full Unicode-aware
word boundaries in regexes? If not, what is?

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Shriramana Sharma ஶ்ரீரமணஶர்மா श्रीरमणशर्मा ������������������������