This question already has an answer here:
It turns out that Non-Joyo kanji which use the 之繞 radical are written with the variant
辶 while Joyo kanji use the more common
⻌ - "常用漢字以外は「辶」を用いる" (See details here).
Are there any other radicals which have variants that are differentiated by Joyo vs Non-Joyo?