Short Spanish-language PDF on battery compatibility, only 88.5 KB, filed with schematics but really a cross-reference table.

PDF of measurement reference values, written in Portuguese, for the Motorola Moto G6 Play, model XT1922.

Schematic diagram for the Y9 Prime 2019, a Huawei smartphone, distributed as a 4.94 MB PDF.

Huawei P Smart 2019 document for model POT-LX3, a 1003 KB PDF whose name uses the Spanish word líneas, meaning lines, which suggests a diagram of the board circuit lines…

Huawei P30 schematic, titled in Spanish, provided as a large 36.5 MB PDF that likely contains a full set of circuit pages.

Samsung SM-J737T schematic at revision 0.5, a 789 KB PDF. The size matches another J7 Star schematic in the index, so it may be the same document under a different name…