如何更改facet-wrapt堆积条形图中的x轴刻度--ggplot R

我正在尝试用我的数据框中的另一个变量替换多面堆叠条形图中的 x 轴刻度。我正在比较两个不同年份的相应周，所以我在 x 轴上使用“year”变量，在 y 轴上使用“total”变量，并按年份中的周数包装（即一月的第一周）得到数字 1，第二个是 2 等）。我已经尝试了很多东西，包括 scale_x_discrete；scale_x_date; axi.ticks.x、geom_text 等....

这是一个可重现的示例：

dat <- data.frame(date = as.Date(c("2021-01-03", "2020-01-05", "2021-01-03", "2020-01-05", "2021-01-03", "2021-01-03", "2021-01-10","2020-01-12", "2021-01-10", "2020-01-12", "2021-01-10", "2021-01-10", "2021-01-17", "2020-01-19", "2021-01-17", "2020-01-19", "2021-01-17", "2021-01-17")),
                 total = c(109334, 150052, 36546, 51476, 2961, 19988, 106719, 126748, 31893, 
                           29576, 5401, 19336, 91021, 108892, 23030, 26115, 3861, 15663),
                 product = c("A", "A","B", "B", "C", "D", "A", "A", "B", "B", "C", "D", "A", 
                              "A","B", "B", "C", "D"),
                 week = c(1,1,1,1,1,1,2,2,2,2,2,2,3,3,3,3,3,3),
                 year = c(2021,2020,2021,2020,2021,2021,2021,2020,2021,2020,2021,2021,2021,2020,2021,2020,2021,2021))  

dat %>% ggplot(aes(year, total, color = year == 2021)) +
  geom_bar(position = "stack", stat = "identity", size =0.6)+
  #scale_x_date(expand = c(0,0), labels = date_format("%m/%d/%y"))+
  scale_y_continuous(expand = c(0,0), breaks = seq(0, 350000, by = 50000), limits=c(0, 350000))+
  #scale_x_discrete(breaks = dat$year, labels = dat$date)+
  scale_color_manual(values = c(NA, 'red'), guide=F)+
  facet_wrap(~week, nrow = 1)+
  #geom_text(aes(y= total, label = date), position = position_dodge(width = 1), angle = 90, vjust = -1, size = 2)+
  theme(axis.text.x=element_text(angle = 90, vjust =0, hjust =0),
        #axis.ticks.x = ,
        axis.title.x = element_blank(),
        axis.title.y = element_blank(),
        panel.background = element_blank(),
        panel.grid.major = element_blank(), 
        panel.grid.minor = element_blank(),
        panel.spacing.x = unit(0.1, "lines"))

最终结果将使 x 轴显示一周的日期（该周的星期日日期）。所需的 x 轴刻度（请忽略上面的 *）

谢谢！