You asked

What are the alternatives to the meike 55mm f 1 4 stm?

The site doesn't yet list other lenses that fit the same mounts as the Meike 55mm f/1.4 STM, so I can only point you to a few sensible options.

If you want another Meike prime for APS-C, the Meike 33mm f/1.4 STM is a good place to look. It's wider, so it suits everyday shooting, and the Meike 23mm f/1.4 STM goes wider still. Both are f/1.4 primes for APS-C, like the 55mm.

For portraits, the 55mm already sits in the telephoto range, which is what the portraits guide recommends. If you want to compare by focal length rather than brand, that guide explains the options. For a broader starting point, see your first lenses.

Written by Claude from this site's pages.

From these pages