In Teamfight Tactics version 13.1, one of the most prominent features was Riot’s nerfing of a series of magic damage squads. From playing reroll with Yuumi, Lulu, Zoe to holding gold to buy levels like Taliyah, all have been nerfed not lightly.

Magic staples have been nerfed in patch 13.1 – source: Riot Games
Furthermore, many Tech Cores and support items for magic staples suffered the same fate of nerfs. This inadvertently helps physical weapons be more popular when they do not fall into the same situation in 13.1.
The champion that benefits the most is probably Samira when she suddenly becomes the strongest main player in the version. Even according to Metatft.com, 3 of the 5 squads with the highest rate of reaching the top 4 currently revolve around the main Samira.

Samira has become the best mainstay version 13.1 – source: Riot Games
With the main form of the backline like Samira, this character is most afraid of champions that deal damage directly to his position. In the previous version, Yuumi and Taliyah were hard counters to Samira. So when these squads are nerfed, it’s understandable that Samira will get stronger.
Furthermore, the physical damage from Infinity Earn buffs will give Samira a big influence from 1 star level. As a result, Samira players can snowball, keep gold and health a lot easier in patch 13.1.

The power-up of Infinity makes many physical masters shine brightly – source: Riot Games
In short, with the decline of counter champions (Yuumi, Taliyah), Samira has become a new star in DTCL. This general will definitely become the “ranking cabinet” of many players in version 13.1.