Halakhah sobre Joel 2:16

The Rosh, may his memory be for a blessing, wrote (Chapter 2 of Tractate Sukkah, paragraph 8):
It must be examined (exactly) what constitutes the “ḥupah”; is it a place where one recites the marriage benedictions, meaning (only that it is) the first stage of marriage and hence called the “ḥupah”? It is impossible to say this, for somethimes they recite the benedictions in the city street while the people are crowding about. Rather, the main dwelling place of the groom and bride is what is called “ḥupah”. It is not a place used (lit. made) by mere chance. And there (the fomer place) they recite the benedictions for seven days.
The custom in Ashkenaz (Germany) is to make a litter and place the groom and bride (on it), and this is called the “ḥupah”.
This is in accordance with an ancient view (custom) and it has Biblical support: “A groom will go out of his chamber, and a bride from her canopy (‘ḥupah’)” (Joel 2:16).
Behold, there is an established (fixed) place that, for this time (the marriage ceremony), is called a “ḥupah”, as it is written: “He is like a groom going out from his canopy (‘ḥupah’)” (Psalms 19:6), meaning (he goes out) from the tent wherein is the “ḥupah”, as it is written in the previous verse: “He placed in them a tent for the sun”³⁴It is possible that the author is basing his proof-text on a now reading of verse 5; changing the vocalization of two words leads to the translation: “to serve there as a tent for them.” (Psalms 19:5).

In my humble opinion, the Halakhic authorities do not differ at all, for behold, it is true that the word “ḥupah” is not written in the Torah, only the word (for) marriage, as it is written: “(In the case of) one who betrothes a woman but has not (yet) taken her…”
[illegible] marriage, since, according to Torah law proper, when he has intercourse with her for the sake of marriage, she is (considered) his wife completely and she is (considered) married. So wrote the Rambam.
However, it is not the way for Israelites to have this intercourse in public, and therefore, we would require witnesses to the “yiḥud” for intercourse. And even if it was possible that there was no need for witnesses to this (“yiḥud”), as it is written in paragraph 5, in every instance the matter would be in public (in reality) - for behold, (we) must bless them with the seven benedictions immediately before the marriage (ceremony). Therefore, our rabbis, may their memories be for a blessing, established that the “ḥupah” will be (can be) in place of the “nisuin” (i.e. the two terms can be used synonymously). It has always been this way; even in the time of the prophets, as it is written: “like a groom going out from his ‘ḥupah’ ” (Psalm 19:6), and, it says: “and a bride from her ‘ḥupah’ ” (Joel 2:16). (Cf. VIII) Obviously (then), thus did Moses our Rabbi instruct (lead) Israel.