Charged isotropic solutions with linear barotropic equations of state in Einstein–Gauss–Bonnet gravity Siyamthanda Remember Mngadi and Sudan Hansraj Eur. Phys. J. C, 85 5 (2025) 524 Published online: 13 May 2025 DOI: 10.1140/epjc/s10052-025-14265-z