Acne scar excision healing (photo)

Hi , I had two acne scars excision . One by my smile line he used about 5 stitches . That one so far is healing like a line . The other one is on my cheek . He only used one stitch and said less is best he also covered it with glue . The picture I posted is about three weeks after sutures were removed . It looks like a gash / slit . Will that skin grow together ? It has like a scab in the slit but not on the surface . Is it normal to only use one stitch ?

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