Well, usually you can find out by researching on manga forums or asking fellow fans. Sometimes, the publishers or official websites also provide guidance on where to pick up after the anime. Another option is to look for recommendations on social media manga groups.
I'd suggest looking for the chapter that directly follows the events of the 2023 anime. Maybe check online manga forums or fan communities for specific recommendations.
You can start from the beginning of the next major story arc. Usually, there are clear indications in fan communities or online discussions about where to pick up.
The best way to know where to start is to look for discussions on manga-focused websites. Fans often share their experiences and advice on continuing after the anime. Another option is to check social media groups dedicated to Baki Hanma to get suggestions from fellow fans.
Blade Fangs was a Japanese manga created by Itagaki Keisuke. There were four works in total, namely Grappler Blade Fangs, Fanma Blade Fangs, Blade Fangs Path, and Blade Fangs Path 2. The theme of this manga was hand-to-hand combat, and it told the story of the young Blade Fang fighting with strong enemies in various underground arena competitions. The characters in the Blade Fangs series had distinct personalities, compact storylines, and unique styles. This series of comics was well-known in China and was welcomed and loved. The animated version of Blade Fangs also had two seasons and could be watched online. As for the viewing order of Blade Fangs, they could be viewed in the order of Blade Fangs 1, Blade Fangs 2, Fanma Blade Fangs, Blade Fangs Path, and Blade Fangs Path 2.
Websites like KissManga and MangaPark might have what you're looking for. But be aware that the availability can vary, and sometimes you might need to search a bit to find the exact chapters you want.