Who planted this palm-a Muslim or an unbelievers The rest of the hadith is the same.
أَنَّ نَبِيَّ اللَّهِ ﷺ دَخَلَ نَخْلاً لأُمِّ مُبَشِّرٍ امْرَأَةٍ مِنَ الأَنْصَارِ فَقَالَ رَسُولُ اللَّهِ ﷺ مَنْ غَرَسَ هَذَا النَّخْلَ أَمُسْلِمٌ أَمْ كَافِرٌ قَالُوا مُسْلِمٌ بِنَحْوِ حَدِيثِهِمْ
[Machine] The Prophet ﷺ entered a date palm grove belonging to Umm Mubashir, a woman from the Ansar. He asked, "Who planted this tree? Is it a Muslim or a non-Muslim?" They replied, "It was planted by a Muslim." He said, "A Muslim should not plant a tree from which a human, animal, or bird eats without it being counted as a charity for him."
أَنَّ رَسُولَ اللهِ ﷺ دَخَلَ نَخْلًا لِأُمِّ مُبَشِّرٍ امْرَأَةٍ مِنَ الْأَنْصَارِ فَقَالَ مَنْ غَرَسَ هَذَا الْغَرْسَ أَمُسْلِمٌ أَمْ كَافِرٌ؟ قَالُوا مُسْلِمٌ قَالَ لَا يَغْرِسُ مُسْلِمٌ غَرْسًا فَيَأْكُلُ مِنْهُ إِنْسَانٌ أَوْ دَابَّةٌ أَوْ طَائِرٌ إِلَّا كَانَ لَهُ صَدَقَةً