From an Ashkenazi perspective, Kitzur Shulchan Aruch 122:6 writes both customs exist
On the three Shabbosos between the seventeenth of Tammuz and Tishah
beAv, we read the "Three haftaros of retribution," which are: [...]
Shim'u devar Hashem, (Hear the word of Hashem) (Jeremiah 2:4) [...] If
Rosh Chodesh Av occurs on Shabbos, he reads the haftarah [...
Found this question posed on https://dinonline.org/2018/04/22/cutting-other-hair-during-sefira/
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Essentially the minhag not to cut hair applies to all hair of the body and not only to facial hair. However it is permitted for a woman to tweeze unsightly hair such as from her eyebrows nose ears, as this is not considered taking a haircut. (In ...