Based on this product's specifications, here are some alternatives and similar models
Woven Replacement Strap for Mi Band 8 Pro / M8 Pro by Beline, Black and White, size for device model
Summary description:
Replacement woven strap designed for Xiaomi Mi Band 8 Pro / M8 Pro, produced by Beline. Dual‑tone black and white fabric construction provides a textile wristband alternative to silicone straps. Easy to attach to the device's connector, suitable for everyday wear, fitness tracking and casual use. Offers breathable fabric comfort and a secure fit for wrist sizes compatible with the band model.