alt Hacker NewsNot one phone, they did this all over the place. Their flagship line did this starting with the Galaxy S7 all the way up to Galaxy S24. Only the most recent Galaxy S25 is Qualcomm Snapdragon only, supposedly because their own Exynos couldn't hit volume production fast enough.
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The S23 too was Snapdragon only, allegedly to let the Exynos team catch some breath and come up with something competitive for the following generation. Which they partly did, as the Exynos S24 is almost on par with its Snapdragon brother. A bit worse on photo and gaming performance, a bit better in web browsing, from the benchmarks I remember.
The S23 was also Snapdragon-only as far as I know[1]. The S24 had the dual chips again, while as you say S25 is Qualcomm only once more.
[1]: https://www.androidauthority.com/samsung-exynos-versus-snapd...
"Galaxy S II" and its aesthetics was already a mere branding shared across at least four different phones with different SoCs, before counting in sub-variants that share same SoCs. This isn't unique to Samsung, nor is it a new phenomenon, just how consumer products are made and sold.
1: https://en.wikipedia.org/wiki/Samsung_Galaxy_S_II