[verb (plain form)] + とみえる / とみえて [i-adj (plain form)] + とみえる / とみえて [na-adj] + だ + とみえる / とみえて [noun] + だ + とみえる / とみえて
The structure とみえる / とみえて is used to express that something appears to be the case based on observable evidence or circumstances. The speaker draws a conclusion or inference from what they can see, hear, or otherwise perceive. It translates to "it seems that," "it appears that," or "apparently."
Attached to the plain form of verbs, adjectives, or nouns (+ だ), とみえる states the speaker's inference as a conclusion.
The て-form とみえて is more common in practice. It connects the inference to a follow-up observation or result – the speaker states what appears to be the case, and then describes a consequence or supporting detail.
While ようだ and みたいだ can also express "it seems," とみえる places stronger emphasis on evidence-based judgment. The speaker is drawing a conclusion from something they have directly observed. It often carries the nuance of "judging from the evidence, it appears that…"
The past tense of the preceding clause is common, especially when inferring what happened from present evidence: