"渡韓ごっこは、家やホテルなどのお泊まり会で、韓国旅行で過ごす夜を再現します。"

Not necessarily a hotel.
I don't think "pretend South Korea trip" is a literal gloss, strictly speaking.

@@ -12,2 +12,2 @@
-<gloss>staying at a hotel (outside of South Korea) with friends while doing things associated with South Korea such as eating Korean food, listening to Korean music, wearing matching pajamas, etc.</gloss>
-<gloss g_type="lit">pretend South Korea trip</gloss>
+<gloss>staying at home or a hotel with friends while doing things associated with South Korea (e.g. eating Korean food, listening to K-pop, watching Korean dramas)</gloss>
+<gloss>pretend South Korea trip</gloss>

@@ -12 +12 @@
-<gloss>hotel staycation done (outside of South Korea) as a group where participants wear matching pajamas, eat Korean food and listen to Korean music, etc.</gloss>
+<gloss>staying at a hotel (outside of South Korea) with friends while doing things associated with South Korea such as eating Korean food, listening to Korean music, wearing matching pajamas, etc.</gloss>

@@ -12 +12 @@
-<gloss>hotel staycation done (outside of Sotuh Korea) as a group where participants wear matching pajamas, eat Korean food and listen to Korean music, etc.</gloss>
+<gloss>hotel staycation done (outside of South Korea) as a group where participants wear matching pajamas, eat Korean food and listen to Korean music, etc.</gloss>

https://gendai.ismedia.jp/articles/-/83940
なぜ若者の間で「渡韓ごっこ」が流行るのか？大人は知らない
Z世代の「遊び方」
最近、1996年〜2012年の間に生まれた「Z世代」と呼ばれる
若者達の間で「渡韓ごっこ」という遊びが流行っているのをご
存知でしょうか？

「渡韓」とはその名の通り、韓国へ渡ること。つまり韓国へ旅
行しにいくことを指します。そして、「渡韓ごっこ」とは、お
泊まり会のコンセプトを「韓国（旅行）」に設定したもののこ
とです。

https://www.hotelmonterey.co.jp/osaka/stay/pla
n/40612cb7082995e.html
話題の【渡韓ごっこ】で韓国旅行気分を存分に味わおう！＜朝
食選択可＞

https://prtimes.jp/main/html/rd/p/000002512.00
0002213.html
【ホテル日航大阪】「渡韓ごっこ&推し活応援宿泊プラン」販
売開始　ホテルでおしゃれに韓国旅行ごっこや推し活を


heard mentioned/explained

covid-19 travel restrictions could be 
mentioned (makes more sense in light of that)